{"id":9174,"date":"2018-02-09T11:05:44","date_gmt":"2018-02-09T05:35:44","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/?p=9174"},"modified":"2022-12-08T16:10:48","modified_gmt":"2022-12-08T10:40:48","slug":"heredity-and-evolution-class-10-notes-science","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/","title":{"rendered":"Heredity and Evolution class 10 Notes Science"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Heredity_and_Evolution_class_10_Notes\" >Heredity and Evolution class 10 Notes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Heredity_class_10_Notes\" >Heredity class 10 Notes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Evolution_class_10_Notes\" >Evolution class 10 Notes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#10_Science_notes_Chapter_9_Heredity_and_Evolution\" >10 Science notes Chapter 9 Heredity and Evolution<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Class_10_Heredity_Notes\" >Class 10 Heredity Notes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Some_important_definitions\" >Some important definitions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Mendel_and_His_Work_on_Inheritance\" >Mendel and His Work on Inheritance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Plant_selected_by_Mendel\" >Plant selected by Mendel<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Mendels_Experiments\" >Mendel&#8217;s Experiments<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Observations_of_Monohybrid_Cross\" >Observations of Monohybrid Cross<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Conclusions_of_Mendels_Experiments\" >Conclusions of Mendel&#8217;s Experiments<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Law_of_Segregation\" >Law of Segregation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Dihybrid_Cross\" >Dihybrid Cross<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Observations\" >Observations<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Conclusions\" >Conclusions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Law_of_Independent_Assortment\" >Law of Independent Assortment<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#SEX_DETERMINATION\" >SEX DETERMINATION<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#FACTORS\" >FACTORS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Sex_Chromosomes\" >Sex Chromosomes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Class_10_Evolution_Notes\" >Class 10 Evolution Notes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Situation_%E2%80%93_I\" >Situation &#8211; I<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Situation-II\" >Situation-II<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#SITUATION-III\" >SITUATION-III<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#ACQUIRED_AND_INHERITED_TRAITS\" >ACQUIRED AND INHERITED TRAITS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#SPECIATION\" >SPECIATION<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#WAYS_BY_WHICH_SPECIATION_TAKES_PLACE\" >WAYS BY WHICH SPECIATION TAKES PLACE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#GENETIC_DRIFT\" >GENETIC DRIFT<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Evolution_and_Classification\" >Evolution and Classification<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#EVOLUTION\" >EVOLUTION<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#TRACING_EVOLUTIONARY_RELATIONSHIPS\" >TRACING EVOLUTIONARY RELATIONSHIPS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#I_Homologous_Organs\" >I. Homologous Organs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#II_Analogous_Organs\" >II. Analogous Organs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#III_Fossils_Paleontological_evidence\" >III. Fossils : (Paleontological evidence)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Evolution_by_Stages\" >Evolution by Stages<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#I_Fitness_Advantage\" >I. Fitness Advantage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#II_Functional_Advantage\" >II. Functional Advantage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Molecular_Phylogeny\" >Molecular Phylogeny<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Tools_to_Study_Human_Evolutionary_Relationship\" >Tools to Study Human Evolutionary Relationship<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#GENETIC_FOOTPRINTS_OF_HUMANS\" >GENETIC FOOTPRINTS OF HUMANS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-40\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#Heredity_and_Evolution_class_10_Notes_Science\" >Heredity and Evolution class 10 Notes Science<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-41\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/#CBSE_Class_10_Revision_Notes_and_Key_Points\" >CBSE Class 10 Revision Notes and Key Points<\/a><\/li><\/ul><\/nav><\/div>\n<p>CBSE class 10 Science Chapter 9 Heredity and Evolution class 10 Notes Science in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Heredity and Evolution class 10 Notes and the latest chapter-wise notes for quick preparation for CBSE board exams and school-based annual examinations. Class 10 Science notes on Chapter 9 Heredity and Evolution are also available for download on the CBSE Guide website.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Heredity_and_Evolution_class_10_Notes\"><\/span>Heredity and Evolution class 10 Notes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>CBSE guide notes are comprehensive notes which cover the latest syllabus of CBSE and NCERT. It includes all the topics given in NCERT class 10 Science textbook. Users can download CBSE guide quick revision notes from the myCBSEguide mobile app and my CBSE guide website. Class 10 Science chapter 9 notes have two parts. These are<\/p>\n<ol>\n<li>Heredity<\/li>\n<li>Evolution<\/li>\n<\/ol>\n<p>Let&#8217;s discuss them one by one.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Heredity_class_10_Notes\"><\/span>Heredity class 10 Notes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Class 10 Science heredity notes include all the topics given in the CBSE syllabus for the current session. Students can download these notes as PDF from <a href=\"https:\/\/myCBSEguide.com\/dashboard\">myCBSEguide.com\/dashboard<\/a>. These are also available for free on the myCBSEguide app.<\/p>\n<p>Heredity notes class 10 Science broadly discusses how organisms acquire the genetic information of their parents. You can say the inheritance of traits from parents to their children. It is the passing on of traits from parents to their offspring either through asexual reproduction or sexual reproduction.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Evolution_class_10_Notes\"><\/span>Evolution class 10 Notes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Evolution is a process that results in <b>changes in the genetic material of a population over time<\/b>. It is, not something happening every day but it&#8217;s a process that takes hundreds of years to reflect noticeable changes. Evolution reflects the adaptations of organisms to their changing environments and can result in altered genes, novel traits, and new species over time.<\/p>\n<p>In this article, we will discuss the main points about evolution as given in the CBSE curriculum document and NCERT book.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"10_Science_notes_Chapter_9_Heredity_and_Evolution\"><\/span>10 Science notes Chapter 9 Heredity and Evolution<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>You can download CBSE class 10th revision notes for Chapter 9 Heredity and Evolution in PDF format for free. These revision notes on Heredity and Evolution class 10 will certainly help students score high in exams. These Heredity and Evolution class 10 Notes are prepared by a team of expert teachers. With the help of these revision notes, you can revise the whole chapter in minutes. Revising notes on exam days is one of the best tips recommended by teachers during exam days.<\/p>\n<p style=\"text-align: center;\"><strong>Revision Notes for Class 10 Science<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>\u00a0<a class=\"button\" href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-10-science\/1176\/\">Download as PDF<\/a><\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Class_10_Heredity_Notes\"><\/span><b>Class 10 Heredity Notes<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Some_important_definitions\"><\/span>Some important definitions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Genetics: Branch of science that deals with Heredity and variation.<\/li>\n<li>Heredity: It means the transmission of features\/ characters\/ traits from one generation to the next generation.<\/li>\n<li>Variation: The differences among the individuals of a species\/population are called variations. It takes place due to environmental changes, crossing over, and recombination of genes and mutation.<\/li>\n<li><strong>Genotype:<\/strong>\u00a0The complete set of genes in an organism\u2019s genome is called genotype.<\/li>\n<li><strong>Phenotype:<\/strong> The observable characteristics in an organism make the phenotype. A phenotype is a modified genotype and many of the phenotypes cannot be inherited.<\/li>\n<li>Clones are those organisms that are exact copies of each other.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Mendel_and_His_Work_on_Inheritance\"><\/span><strong>Mendel and His Work on Inheritance<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Mendel was known as the Father of Genetics.<\/p>\n<ul>\n<li>Gregor Johann Mendel (1822&amp; 1884): Started his experiments on plant breeding and hybridization. He proposed the laws of inheritance in living organisms.<\/li>\n<li>Law of Dominance, Law of segregation, and Law of Independent Assortment.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Plant_selected_by_Mendel\"><\/span><strong>Plant selected by Mendel<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Pisumsativum (garden pea). Mendel used a number of contrasting characters for garden peas.<br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_01.png\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mendels_Experiments\"><\/span><strong>Mendel&#8217;s Experiments<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Mendel conducted a series of experiments in which he crossed the pollinated plants to study one character (at a time)<\/p>\n<ul>\n<li>A Cross between two pea plants with one pair of contrasting characters is called a monohybrid cross.<\/li>\n<li>Cross between a tall and a draft plant (short).<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_02.jpg\" \/><br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_03.png\" \/><br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_04.png\" \/><\/p>\n<p>Phenotypic ratio : 3:1<\/p>\n<p>Genotypic ratio : 1:2:1<\/p>\n<p>Phenotype \u00ae Physical appearance [Tall or Short]\n<p>Genotype \u00ae Physical appearance [Tall or short]\n<h3><span class=\"ez-toc-section\" id=\"Observations_of_Monohybrid_Cross\"><\/span><strong>Observations of Monohybrid Cross<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li>All F1 progeny were tall (no medium height plant (half way characteristic)<\/li>\n<li>F2 progeny \u00bc were short, 3\/4 were tall<\/li>\n<li>Phenotypic ratio F2 \u2013 3 : 1 (3 tall : 1 short)<\/li>\n<\/ol>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\left( {\\begin{array}{*{20}{l}} {TT{\\text{ }}:{\\text{ }}Tt{\\text{ }}:{\\text{ }}tt} \\\\ {\\;\\;1{\\text{ }}:{\\text{ }}2{\\text{ }}\\;\\;:{\\text{ }}1} \\end{array}} \\right)\" \/><\/span><\/span><\/p>\n<p>Genotypic ratio F2 \u2013 1:2:1<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Conclusions_of_Mendels_Experiments\"><\/span><strong>Conclusions of <\/strong><strong>Mendel&#8217;s Experiments<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li>TT and Tt both are tall plants while tt is a short plant.<\/li>\n<li>A single copy of T is enough to make the plant tall, while both copies have to be \u2018t\u2019 for the plant to be short.<\/li>\n<li>Characters\/Traits like &#8216;T&#8217; are called dominant trait (because it express itself) and \u2018t\u2019 are recessive trait (because it remains suppressed)<\/li>\n<\/ol>\n<p>From these observations, Mendel put forward the rules of inheritance<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Law_of_Segregation\"><\/span>Law of Segregation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Every individual possesses a pair of alleles for a particular trait. During gamete formation, a gamete receives only one trait from the alleles. A particular trait can be dominant or recessive in a particular generation.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dihybrid_Cross\"><\/span><strong>Dihybrid Cross<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A cross between two plants having two pairs of contrasting characters is called a dihybrid cross.<\/p>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\mathop {Parent}\\limits_{Generation} \\to \\mathop {Round}\\limits_{Green\\,\\,seeds} \\,\\, \\times \\mathop {Wrinkled}\\limits_{Yellow\\,\\,seeds}\" \/><\/span><\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_05.png\" \/><\/p>\n<p><strong>Phenotypic Ratio<\/strong><\/p>\n<p>Round, yellow : 9<br \/>\nRound, green : 3<br \/>\nWrinkled, yellow : 3<br \/>\nWrinkled, green : 1<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Observations\"><\/span><strong>Observations<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li>When <strong>RRyy<\/strong> was crossed with rrYY in F1 generation all were Rr Yy round and yellow seeds.<\/li>\n<li>Self-pollination of F plants gave parental phenotype and two mixtures(recombinants round yellow &amp; wrinkled green) seeds plants in the ratio of 9:3:3:1<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Conclusions\"><\/span><strong>Conclusions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li>Round and yellow seeds are <strong>DOMINANT <\/strong>characters<\/li>\n<li>The occurrence of new phenotypic combinations shows that genes for round and yellow seeds are inherited independently of each other.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Law_of_Independent_Assortment\"><\/span>Law of Independent Assortment<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Alleles of different characters separate independently from each other during gamete formation. In the above example, alleles of texture were assorted independently from those of seed colour.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"SEX_DETERMINATION\"><\/span><strong>SEX DETERMINATION<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Determination of the sex of an offspring.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"FACTORS\"><\/span><strong>FACTORS<\/strong><br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_06.jpg\" \/><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h3><span class=\"ez-toc-section\" id=\"Sex_Chromosomes\"><\/span><strong>Sex Chromosomes<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>In human beings, there are 23 pairs of chromosomes. Out of these 22 chromosomes, pairs are called autosomes and the last pair of chromosomes that help in deciding the gender of that individual is called the sex chromosome.<\/p>\n<p>XX \u2013 female<br \/>\nXY \u2013 male<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_07.jpg\" \/><\/p>\n<p>This shows that half the children will be boys and half will be girls. All children will inherit an X chromosome from their mother regardless of whether they are boys or girls. Thus sex of children will be determined by what they inherit from their father, and not from their mother.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Class_10_Evolution_Notes\"><\/span><strong>Class 10 Evolution Notes<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Evolution is the sequence of gradual changes which takes place in primitive organisms, over millions of years, in which new species are produced.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Situation_%E2%80%93_I\"><\/span>Situation &#8211; I<br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_08.jpg\" \/> <img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_09.jpg\" \/><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Situation 1<\/strong>: Green beetles got the survival advantage or they were naturally selected as they were not visible in green bushes. This natural selection is exerted by crows resulting in adaptations in the beetles to fit better in their environment<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Situation-II\"><\/span><strong>Situation-II<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_10.jpg\" \/><\/p>\n<p><strong>Situation 2<\/strong>: Blue beetles did not get a survival advantage. An elephant suddenly caused major havoc in the beetle population otherwise their number would have been considerably large.<\/p>\n<p>From this we can conclude that accidents can change the frequency of some genes even if they do not get a survival advantage: This is called genetic drift and it leads to variation.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"SITUATION-III\"><\/span><strong>SITUATION-III<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Group of red beetles<\/p>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\downarrow\" \/><\/span><\/span><\/p>\n<p>Habitat of beetles (bushes)<\/p>\n<p>Suffer from plant disease<\/p>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\downarrow\" \/><\/span><\/span><\/p>\n<p>The average weight of beetles<\/p>\n<p>decreases due to poor nourishment<\/p>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\downarrow\" \/><\/span><\/span><\/p>\n<p>The number of beetles kept on reducing<\/p>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\downarrow\" \/><\/span><\/span><\/p>\n<p>Later plant diseases get eliminated<\/p>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\;\\downarrow\" \/><\/span><\/span><\/p>\n<p>Number and average weight of the beetles<\/p>\n<p>increases again<\/p>\n<p><strong>Situation 3<\/strong>: No genetic change has occurred in the population of beetle. The population gets affected for a short duration only due to environmental changes.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"ACQUIRED_AND_INHERITED_TRAITS\"><\/span><strong>ACQUIRED AND INHERITED TRAITS<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>They get transferred to the progeny. The low weight of starving beetles3. They are helpful in evolution. eg. Colour of eyes and hair.<\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"3\">\n<tbody>\n<tr>\n<td><strong>Acquired Traits<\/strong><\/td>\n<td><strong>Inherited Traits<\/strong><\/td>\n<\/tr>\n<tr>\n<td>1. These are the traits that are developed in an individual due to special conditions<\/td>\n<td>1. These are the traits that are passed from one generation to the next.<\/td>\n<\/tr>\n<tr>\n<td>2. They cannot be transferred to the progeny<\/td>\n<td>2. They cannot direct evolution.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"SPECIATION\"><\/span><strong>SPECIATION<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Micro Evolution<\/strong>: It is the evolution that is on a small scale. e.g.change in the body colour of beetles. The process by which new species develop from the existing species is known as speciation.<\/li>\n<li><strong>Speciation<\/strong>: it is the process of formation of new species.<\/li>\n<li><strong>Species:<\/strong> A group of similar individuals within a population that can interbreed and produce fertile offspring. Factors that lead to speciation: Geographical isolation, genetic drifts and variations.<\/li>\n<li><strong>Geneflow<\/strong>: It is the exchange of genetic material by interbreeding between populations of the same species or individuals<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"WAYS_BY_WHICH_SPECIATION_TAKES_PLACE\"><\/span><strong>WAYS BY WHICH SPECIATION TAKES PLACE<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Speciation takes place when variation is combined with geographical isolation.<\/p>\n<p><strong>Gene flow<\/strong>: occurs between populations that is partly but not completely separated.<br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_11.jpg\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"GENETIC_DRIFT\"><\/span><strong>GENETIC DRIFT<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It is the random change in the frequency of alleles (gene pair) in a population over successive generations.<\/p>\n<p>*<strong>Natural Selection<\/strong>: The process by which nature selects and consolidates those organisms which are more suitably adapted and possess favorable variations<br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_12.png\" \/><\/p>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\downarrow\" \/><\/span><\/span><\/p>\n<p>Results in Accumulation of different variations in<\/p>\n<p>Subpopulation <span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?{Z_1}\" \/><\/span><\/span>\u00a0and <span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?{Z_{{2_{}}}}\" \/><\/span><\/span><\/p>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi? \\downarrow\" \/><\/span><\/span><\/p>\n<p>Genetic drift<\/p>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi? \\downarrow\" \/><\/span><\/span><br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_13.jpg\" \/><\/p>\n<p>Genetic drift takes place due to<\/p>\n<ol>\n<li>Severe changes in the DNA<\/li>\n<li>Change in the number of chromosomes<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Evolution_and_Classification\"><\/span><strong>Evolution and Classification<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"EVOLUTION\"><\/span><strong>EVOLUTION<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The process by which different kinds of living organisms are believed to have developed from earlier forms during the history of the earth<\/p>\n<p>Both evolution and classification are interlinked.<\/p>\n<p>1. Classification of species is a reflection of their evolutionary relationship.<br \/>\n2. The more characteristics two species have in common the more closely they are related.<br \/>\n3. The more closely they are related, the more recently they have a common ancestor.<br \/>\n4. Similarities among organisms allow us to group them together and to study their characteristic.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_14.jpg\" \/><br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_15.png\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"TRACING_EVOLUTIONARY_RELATIONSHIPS\"><\/span><strong>TRACING EVOLUTIONARY RELATIONSHIPS<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Jean Baptiste Lamarck gave the first theory of evolution. The accepted one is The Origin of Species by Charles Darwin. <\/strong>(Evidence of Evolution)<\/p>\n<h3><span class=\"ez-toc-section\" id=\"I_Homologous_Organs\"><\/span>I. <strong>Homologous Organs<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>(Morphological and anatomical evidence. These are the organs that have the same basic structural plan and origin but different functions. Homologous organs provide evidence for evolution by telling us that they are derived from the same ancestor.<\/p>\n<p>Example :<\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"3\">\n<tbody>\n<tr>\n<td>Forelimb of Horse<\/td>\n<td>(Running)<\/td>\n<td rowspan=\"3\">Same basic structural plan, but different functions perform.<\/td>\n<\/tr>\n<tr>\n<td>Winds of bat<\/td>\n<td>(flying)<\/td>\n<\/tr>\n<tr>\n<td>Paw of a cat<\/td>\n<td>(walk\/scratch\/attack)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"II_Analogous_Organs\"><\/span>II. <strong>Analogous Organs<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>These are the organs that have different origins and structural plans but the same function example :<\/p>\n<p><strong>Example<\/strong>: Analogous organs provide mechanisms for evolution.<\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"3\">\n<tbody>\n<tr>\n<td>Wings of bat <span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\xrightarrow{{}}\" \/><\/span><\/span><\/td>\n<td>Elongated fingers with skin folds<\/td>\n<td rowspan=\"2\">Different basic structures, but perform similar functions i.e., flight.<\/td>\n<\/tr>\n<tr>\n<td>Wings of bird <span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\xrightarrow{{}}\" \/><\/span><\/span><\/td>\n<td>Feathery covering along the arm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"III_Fossils_Paleontological_evidence\"><\/span><strong>III. Fossils<\/strong> : (Paleontological evidence)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The remains and relics of dead organisms of the past.<\/p>\n<p><strong>FOSSILS ARE PRESERVED TRACES OF LIVING ORGANISMS<\/strong><\/p>\n<p>Fossil Archaeopteryx possess features of reptiles as well as birds. This suggests that birds have evolved from reptiles.<\/p>\n<p><strong>Examples of Fossils<\/strong><\/p>\n<ul>\n<li>AMMONITE &#8211; Fossil-invertebrate<\/li>\n<li>TRILOBITE &#8211; Fossil-invertebrate<\/li>\n<li>KNIGHTIA &#8211; Fossil-fish<\/li>\n<li>RAJASAURUS &#8211; Fossil dinosaur skull<\/li>\n<\/ul>\n<p><strong>AGE OF THE FOSSILS<\/strong><br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_16.jpg\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Evolution_by_Stages\"><\/span><strong>Evolution by Stages<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Evolution takes place in stages ie bit by bit over generations.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"I_Fitness_Advantage\"><\/span><strong>I. Fitness Advantage<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Evolution of Eyes<\/strong>: The evolution of complex organs is not sudden it occurs due to minor changes in DNA, however, takes place bit by bit over generations.<br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_17.jpg\" \/><\/p>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?x\\;rightarrow\" \/><\/span><\/span>\u00a0Insects have compound eyes<\/p>\n<p><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?x\\;rightarrow\" \/><\/span><\/span>\u00a0Humans have binocular eyes<\/p>\n<h3><span class=\"ez-toc-section\" id=\"II_Functional_Advantage\"><\/span>II. <strong>Functional Advantage<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Evolutions of Feathers<\/strong><\/p>\n<p>Feathers {\/tex} \\to {\/tex} provide insulation in cold weather but later they might become useful for flight.<br \/>\nExample: Dinosaurs had feathers, but could not fly using feathers. Birds seem to have later adapted the feathers to flight.<br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_18.jpg\" \/><\/p>\n<p><strong>Evolution by Artificial Selection<\/strong><\/p>\n<p>Humans have been a powerful agent in modifying wild species to suit their own requirements throughout ages by using artificial selection. e.g. (i) From wild cabbage many varieties like broccoli, cauliflower, red cabbage, kale, cabbage and<\/p>\n<p>kohlrabi were obtained by artificial selection. (ii) Wheat (many varieties obtained due to artificial selection).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Molecular_Phylogeny\"><\/span><strong>Molecular Phylogeny<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>It is based on the idea that changes in DNA during reproduction are the basic events in the evolution<\/li>\n<li>Organisms that are more distantly related will accumulate greater differences in their DNA<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Tools_to_Study_Human_Evolutionary_Relationship\"><\/span><strong>Tools to Study Human Evolutionary Relationship<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Excavating<\/li>\n<li>Time dating<\/li>\n<li>Fossils<\/li>\n<li>Determining<\/li>\n<li>DNA Sequences<\/li>\n<\/ul>\n<p>Although there is the great diversity of human forms all over the world get all humans are a single species<\/p>\n<h2><span class=\"ez-toc-section\" id=\"GENETIC_FOOTPRINTS_OF_HUMANS\"><\/span><strong>GENETIC FOOTPRINTS OF HUMANS<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hundreds\/thousands of years ago<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/revise\/10\/science\/10_sc_ch09_19.jpg\" \/><\/p>\n<ul>\n<li>They did not go in a single line<\/li>\n<li>They went forward and backward<\/li>\n<li>Moved in and out of Africa<\/li>\n<li>Sometimes come back to mix with each other.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Heredity_and_Evolution_class_10_Notes_Science\"><\/span>Heredity and Evolution class 10 Notes Science<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>CBSE Revision notes (PDF Download) Free<\/li>\n<li>CBSE Revision notes for Class 10 Science PDF<\/li>\n<li>Revision notes Class 10 Science \u2013 CBSE<\/li>\n<li>CBSE Revisions notes and Key Points Class 10 Science<\/li>\n<li>Summary of the NCERT books all chapters in Science class 10<\/li>\n<li>Short notes for CBSE class 10th Science<\/li>\n<li>Keynotes and chapter summary of Science class 10<\/li>\n<li>Quick revision notes for CBSE board exams<\/li>\n<li>Heredity and Evolution class 10 Notes Science<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Class_10_Revision_Notes_and_Key_Points\"><\/span><strong>CBSE Class 10 Revision Notes and Key Points<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Heredity and Evolution class 10 Notes Science. CBSE quick revision notes for Class-10 Science, Chemistry, Maths, Biology and other subject are very helpful to revise the whole syllabus during exam days. The revision notes cover all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save you time during stressful exam days.<\/p>\n<ul>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10-mathematics\/1202\/cbse-revision-notes\/7\/\">Mathematics<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10-science\/1176\/cbse-revision-notes\/7\/\">Science<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10-social-science\/1896\/cbse-revision-notes\/7\/\">Social Science<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10-english-communicative\/1901\/cbse-revision-notes\/7\/\">English Communicative<\/a><\/li>\n<\/ul>\n<p>To download Heredity and Evolution class 10 Notes Science, sample paper for class 10 Mathematics, Science, English Communicative; do check myCBSEguide app or website. myCBSEguide provides sample papers with solutions, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample papers all are made available through <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a> and the myCBSEguide website.<\/p>\n<ul>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/chemical-reactions-equations-class-10-notes-science\/\">Chemical Reactions and Equations class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/acids-bases-salts-class-10-notes-science\/\">Acids Bases and Salts class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/metals-non-metals-class-10-notes-science\/\">Metals and Non-metals class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/carbon-compounds-class-10-notes-science\/\">Carbon and its Compounds class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/periodic-classification-elements-class-10-notes-science\/\">Periodic Classification of Elements class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/life-processes-class-10-notes-science\/\">Life Processes class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/control-coordination-class-10-notes-science\/\">Control and Coordination class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/organisms-reproduce-class-10-notes-science\/\">How do Organisms Reproduce class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/light-reflection-refraction-class-10-notes-science\/\">Light Reflection and Refraction class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/human-eye-colourful-world-class-10-notes-science\/\">Human Eye and Colourful World class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/electricity-class-10-notes-science\/\">Electricity class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/magnetic-effects-electric-current-class-10-notes-science\/\">Magnetic Effects of Electric Current class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/sources-energy-current-class-10-notes-science\/\">Sources of Energy Current class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/environment-class-10-notes-science\/\">Our Environment class 10 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/management-natural-resources-class-10-notes-science\/\">Management of Natural Resources class 10 Notes Science<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>CBSE class 10 Science Chapter 9 Heredity and Evolution class 10 Notes Science in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Heredity and Evolution class 10 Notes and the latest chapter-wise notes for quick preparation for CBSE board exams and school-based annual examinations. Class &#8230; <a title=\"Heredity and Evolution class 10 Notes Science\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/\" aria-label=\"More on Heredity and Evolution class 10 Notes Science\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":9081,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46,456],"tags":[457,150,525,426,240],"class_list":["post-9174","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cbse-class-10","category-revision-notes","tag-cbse-notes","tag-cbse-notes-and-key-points","tag-heredity-and-evolution","tag-quick-revision","tag-quick-revision-notes"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Heredity and Evolution class 10 Notes Science | myCBSEguide<\/title>\n<meta name=\"description\" content=\"Heredity and Evolution class 10 Notes Science chapter 9 in PDF format for free download. Latest chapter wise notes for CBSE board exams.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mycbseguide.com\/blog\/heredity-and-evolution-class-10-notes-science\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Heredity and Evolution class 10 Notes Science | myCBSEguide\" \/>\n<meta property=\"og:description\" content=\"Heredity and Evolution class 10 Notes Science chapter 9 in PDF format for free download. 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