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प्रश्न
In a monohybrid cross between tall pea plants (TT) and short pea plants (tt), a scientist obtained only tall pea plants (Tt) in the F1 generation. However, on selfing the F1 generation pea plants, he obtained both tall and short plants in F2 generation. On the basis of above observations with other angiosperms also, can the scientist arrive at a law? If yes, explain the law. If not, give justification for your answer.
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उत्तर
Based on the given experiment, two laws were formulated by Mendel. They are as follows:-
Law of Dominance
- According to this law, characters are controlled by discrete units called factors that occur in pairs, with one member of the pair dominating over the other in a dissimilar pair.
- This law explains the expression of only one of the parental characters in F1 generation and expression of both in F2 generation.
Law of Segregation
- This law states that the two alleles of a pair segregate or separate during gamete formation in such a way that a gamete receives only one of the two factors.
- In homozygous parents, all gametes produced are similar; while in heterozygous parents, two kinds of gametes are produced in equal proportions.
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संबंधित प्रश्न
Outline a project which aims to find the dominant coat colour in dogs.
What type of plants were used by Mendel for conducting his experiments on inheritance?
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Pure tall pea plant × Pure dwarf pea plant
What is the genotype of dwarf plants which always produced dwarf offspring?
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Round seed
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What are the possible blood groups likely to be inherited by children born to a group A mother and a group B father? Explain your reasoning.
A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits-blood group A or O - is dominant? Why or why not?
"It is possible that a trait is inherited but may not be expressed." Give a suitable example to justify this statement.
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