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Ask QuestionPosted by Abhit Saini 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
Mendel selected true breeding tall (TT) and dwarf (tt) pea plants.When a tall pea plant is crossed with a short (dwarf) pea plant, all the F1 hybrids are tall. (i.e., in this case, the gene causing tallness is dominant while the gene causing dwarfness is recessive.).The trait expressing itself in the hybrid is the dominant one.
(Mendel’s first law of inheritance states that when a pair of contrasting factors is brought in a hybrid, one factor inhibits the appearance of the other. The one which inhibits is the dominant one and which is inhibited is recessive.)
- In Mendel’s experiment of breeding tall (TT) and dwarf (tt) plants, Mendel found that all plants in the F1 generation were tall.
- The F1 generation had genetic constitution Tt. It is genotypically a hybrid and a heterozygous plant having two different alleles, T and t.
- Phenotypically, the plant is tall because the allele or the gene T for tallness masks the effect of its corresponding recessive gene t.
- So, dwarf plants with genotype (tt) were not obtained in the F1 generation. This implies that out of two, one of the contrasting characters for a particular trait is dominant which masks the expression of the other character which then becomes recessive.
- This experiment showed that traits may be dominant or recessive, depending on their expression in the F1 generation.
Posted by Aadya Singh ? 5 years, 11 months ago
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Diksha? 5 years, 11 months ago
Posted by Parthiv K.Jyothish 5 years, 11 months ago
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Aadya Singh ? 5 years, 11 months ago
b) H2SO4 acts as an catalyst and a dehydrating agent which help in the removing water formed in the reaction between alcohol and carboxylic acids...
Posted by Shubham Yadav 5 years, 11 months ago
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Shubham Yadav 5 years, 11 months ago
Posted by Parthiv K.Jyothish 5 years, 11 months ago
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Vikas Saini 5 years, 11 months ago
Posted by Faiz Khan 5 years, 11 months ago
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Shubham Yadav 5 years, 11 months ago
Yogita Ingle 5 years, 11 months ago
The production of a new species from two different species is known as speciation.
Factors responsible for it are:-
1)Natural selection:-Due some natural incidents ,there are genetic variations in new individuals,which led to evolving of new species.
2)Genetic drift:-Sudden alternation in gene frequency is called genetic drift
3)Survival advantage:-Due to camouflage some species enjoy the survival advantage.
4)Migration:-Migration of differnt species also led to evolvement of new species.
Aditya Rajput 5 years, 11 months ago
Posted by P Naik 5 years, 11 months ago
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Aadya Singh ? 5 years, 11 months ago
Posted by Noufal Zidane 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
Dialysis is primarily used to provide an artificial replacement for lost kidney function (renal replacement therapy) due to renal failure. Dialysis is the artificial process of eliminating waste (diffusion) and unwanted water (ultrafiltration) from the blood. In a healthy man, kidney does this process naturally. Some people may have damaged or failed kidneys which no longer filter toxins from the blood. They do purify their blood through dialysis.
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Posted by Aman Narwal 5 years, 11 months ago
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Posted by Honey?? #Girl 5 years, 8 months ago
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Aditya Rajput 5 years, 11 months ago
Dr. Sanskari ?⚕️?⚕️ 5 years, 11 months ago
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Honey?? #Girl 5 years, 11 months ago
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Aadya Singh ? 5 years, 11 months ago
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Aadya Singh ? 5 years, 11 months ago
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Aseem Mahajan 5 years, 11 months ago
Aseem Mahajan 5 years, 11 months ago
Aseem Mahajan 5 years, 11 months ago
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Aseem Mahajan 5 years, 11 months ago
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Posted by Sanjay Kumar 5 years, 11 months ago
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Posted by Tushar Agarwal 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
Digestive enzymes such as amylase, lipase, pepsin, trypsin, etc. helps to break the complex food particles into simple ones so that these simple particles can be easily absorbed by the blood and thus transported to all the cells of the body.
Aseem Mahajan 5 years, 11 months ago
Posted by Anisha Dawani 5 years, 11 months ago
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Dř Nayar 5 years, 11 months ago
Aditya Rajput 5 years, 11 months ago
Aseem Mahajan 5 years, 11 months ago
Posted by Sameer Mahindru 5 years, 11 months ago
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Aadya Singh ? 5 years, 11 months ago
6CO2 + 6H2O + sunlight+ chlorophyll ----------> C6H12O6 + 6O2.
Posted by Kanchan Halder 5 years, 11 months ago
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Posted by Anand Sahu 5 years, 11 months ago
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Posted by Anand Sahu 5 years, 11 months ago
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Aseem Mahajan 5 years, 11 months ago
Posted by Pramod Mishra 5 years, 11 months ago
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Posted by Kanchan Halder 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
Heteroatoms are all those atoms except carbon and hydrogen, which are present in compounds. Examples are oxygen, sulphur, nitrogen, etc. These heteroatoms are mainly those which form the backbone structures of different molecules
Posted by Anshum Dhiman 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
The bending of plant towards light is known as phototropism. It is due to plant hormone auxins. When the growing parts of a phototropic plant detect sunlight, auxins (synthesized at the shoot tips) help the cells grow longer. When light falls on one side of the plant, the auxins generally diffuse towards the shaded side of the shoot. This stimulates the cells in the shaded area to grow longer than the corresponding cells of the illuminated region. This results in the curvature of the plant stem tip towards the light.
Posted by Shubham Yadav 5 years, 11 months ago
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Aditya Rajput 5 years, 11 months ago
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Posted by Shubham Yadav 5 years, 11 months ago
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Aditya Rajput 5 years, 11 months ago
Manisha No 5 years, 11 months ago
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Posted by Shubham Yadav 5 years, 11 months ago
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Aarti Rana 5 years, 11 months ago
Aditya Rajput 5 years, 11 months ago
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Manisha No 5 years, 11 months ago
Posted by Shubham Yadav 5 years, 11 months ago
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?️Roman ?️ 5 years, 11 months ago
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Posted by Harsh Raj 5 years, 11 months ago
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Posted by Harsh Raj 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
- Saliva contains a digestive enzyme called salivary amylase, which converts carbohydrates in to maltose sugars.
- It cleans the mouth cavity and tends to destroy germs that cause teeth decay. It contains lysozomes which help in destroying the bacteria.
- It moistens and lubricates food which again helps in swallowing.
- It acts as solvent, dissolving some food particles to stimulate taste buds of the tongue.
Yashawini Srikanth 5 years, 11 months ago
Posted by K Kumar 5 years, 11 months ago
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Yogita Ingle 5 years, 11 months ago
Gregor Mendel chose pea plant because the garden pea is an ideal subject in the study of genetics for the following reasons:
(i)They grow quickly.
(ii)They have a short life-cycle.
(iii)They are easily self- and cross-pollinated and produces many offspring in one cross.
(iv)They have easily observed characteristics.
Ratnesh Sonkar 5 years, 11 months ago
Posted by Sufyan Aslam 5 years, 11 months ago
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Vikas Saini 5 years, 11 months ago
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