Ask questions which are clear, concise and easy to understand.

Please Wait.. Editor is Loading..
  • 1 answers

Sia 🤖 5 hours ago

The limits of the life span of each species appear to be determined ultimately by heredity. Locked within the code of the genetic material are instructions that specify the age beyond which a species cannot live given even the most favourable conditions.

  • 2 answers

Nishu Goyal 2 hours ago

Because by taking precautions like protecting healthy cells they can easily kill the tumour

Chetan Rathore 3 hours ago

They stop cell growth
  • 1 answers

Gaurav Seth 13 hours ago



Is an inherited bleeding disorder, manifesting predominantly in worldwide male population. However, about 30% of hemophilia patients have no prior family history of bleeding disorder. In these cases, it is caused by mutation in their genes that lead to bleeding disorder. It is a lifelong disease.


Is a group of inherited blood disorders. It can affect people of any nationality, but it is particularly common in people with ancestry from the Mediterranean and across a broad region extending through India, the Middle East and Asia. It can occur in both male and female population. It is a lifelong disease.

Root Cause


People with hemophilia have either defective or lack of clotting factors. Clotting factors are protein in blood necessary to stop bleeding. The body produces 13 clotting factors. If any of them are defective or deficient, blood clotting is affected. People with hemophilia usually have longer bleeding time compared to unaffected people.


People with thalassemia have either abnormal or lack of hemoglobin in their red blood cells. The bone marrow is responsible for the production of hemoglobin, using iron from diet intake to produce hemoglobin. 

  • 1 answers

Nishu Goyal 2 hours ago

Coding segments of DNA that are actually reponsible for coding protein
  • 1 answers

Sanjay Choudary 1 day, 2 hours ago

Yes.... 20 out of 70 marks are mcqs...
  • 2 answers

Sumit Gurjar 1 day, 10 hours ago

Yes paper will always from ncert
yes ncert is sufficient no need to follow refresher for genetics.
  • 2 answers
if u have pcmb then u can do engineering otherwise no

Disha Gharu 2 days, 2 hours ago

Yes ,u can be a genetic engineer...
  • 0 answers
  • 1 answers

Arman Ahmed 2 days, 8 hours ago

Read the microsporangium topic in ncert class 12 biology
  • 1 answers

Sonam Kumari 2 days, 12 hours ago

Repetive dna is the non coding sequence of dna that contains segments that are repeted several times in the genome of an individual.The repetive dna sequences are called variable no of tandem. Satellite dna are dna sequences thar contain highily repetive dna . Satellite dna is a type of repeitve which is classified on the basis of repetive units , no of base pair e.t.c
  • 1 answers

Gaurav Seth 3 days, 4 hours ago

During microsporogenesis, meiosis occurs in:
A. Endothecium

B. Microspore mother cells
C. Microspore tetrads
D. Pollen grains.


During Microsporogenesis, meiosis occurs in microspore mother cells.

As anther develops the cells of Sporongenous tissues undergo meiotic divisions to form microspore tetrads.

The microspore tetrad after dehydration is separated into pollen grains.

Endothecium is the lining of the cavity of an anther.

Therefore, the correct answer is option (b).

  • 1 answers

Yogita Ingle 3 days, 6 hours ago

Semen (produced in males) is composed of sperms and seminal plasma. The major components of the seminal plasma in the male reproductive system are mucus, spermatozoa, and various secretions of accessory glands. The seminal plasma is rich in fructose, calcium, ascorbic acid, and certain enzymes. It provides nourishment and protection to sperms.

  • 1 answers

Nishu Goyal 2 hours ago

Because there are chances that they will use already used needles (used by AIDS patient ) for taking drug by interveinous method
  • 5 answers

Sumit Gurjar 1 day, 10 hours ago


Shivam Bhadouriya 3 days, 4 hours ago

Ok now i got it

Shivam Bhadouriya 3 days, 4 hours ago

Pls correct me

Shivam Bhadouriya 3 days, 4 hours ago

whether? But i think removal lo introns is universal?

Sonam Kumari 3 days, 10 hours ago

RNA determines weather to keep introns or remove introns in split gene arrangement..... Hence, it dominates in RNA world
  • 1 answers

Nishu Goyal 2 hours ago

Vector is going to provide clonning site to the piece of desired gene so that it can form multiple copies and perform its function .
  • 3 answers

Disha Trivedi 3 days, 10 hours ago

it is double stranded,has phosphodiester bond,it consist of thymine which is stable.

Harpreet Kaur 3 days, 12 hours ago

DNA is more stable than rna because firstly DNA has one oh group while rna has two . More the number of functional group more is the reactivity and less is stability. Secondly in DNA a binds with t which is stable base while in rna a binds with u which is unstable. Hence DNA is more stable .

Shivam Chaurasia 4 days, 10 hours ago

Because it has only single strands,it have additional o atom at 5 position,
  • 1 answers

Gursharn Kaur 4 days, 10 hours ago

X body is a dense material present which connects the radial fibres of a centromere to ABC Fibres
  • 3 answers

Disha Trivedi 3 days, 9 hours ago

meiosis 2 occurs when secondary oocyte changes to ovum

Disha Trivedi 3 days, 9 hours ago

meosis 2 occurs when after fertilisation primary oocyte changes to secondary oocyte

Sonam Kumari 4 days, 15 hours ago

Meiosis 2 occurs only aftr fertilsation rresulting in mature ovum and sec polar body
  • 1 answers

Yogita Ingle 5 days, 11 hours ago

It is a method of breeding crops with higher levels of vitamins, minerals, healthier fats to improve public health. The objective of breeding for improved nutritional quality is to enhance:
(a) Protein and oil content, and quality.
(b) Vitamin content.
(c)  Micronutrients and mineral content.

Buy Complete Study Pack

Subscribe complete study pack and get unlimited access to selected subjects. Effective cost is only ₹ 12.5/- per subject per month. Based on the latest CBSE & NCERT syllabus.

myCBSEguide App


Trusted by 70 Lakh Students

CBSE Test Generator

Create papers in minutes

Print with your name & Logo

Download as PDF

3 Lakhs+ Questions

Solutions Included

Based on CBSE Blueprint

Best fit for Schools & Tutors

Work from Home

  • Work from home with us
  • Create questions or review them from home

No software required, no contract to sign. Simply apply as teacher, take eligibility test and start working with us. Required desktop or laptop with internet connection