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प्रश्न
The gene for red hair is recessive to the gene for black hair. What will be the hair colour of a person if he inherits a gene for red hair from his mother and a gene for black hair from his father?
उत्तर
The hair colour of the person will be black because the gene for red hair is recessive compared to black.
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संबंधित प्रश्न
In one of his experiments with pea plants, Mendel observed that when a pure tall pea plant is crossed with a pure dwarf pea plant in the first generation, F1, only tall plants appear.
(a) What happens to the traits of the dwarf plants in this case?
(b) When the F1-generation plants were self-fertilised, he observed that in the plants of the second generation, F2, both tall plants and dwarf plants were present. Why it happened? Explain briefly.
List any two contrasting characters other than height that Mendel used in his experiments in pea plants.
Using height (tallness/dwarfness) of a plant as an example, show that genes control the characteristics or traits in an organism.
What are the units of heredity.
Why did Mendel choose pea plants for conducting his experiments on inheritance?
State Mendel's second law of inheritance.
How do Mendel's experiments show that traits are inherited independently?
For his experiments on heredity, Mendel used :
papaya plants
potato plants
pea plants
pear plants
The following results were obtained by a scientist who crossed the F1 generation of pure-breeding parents for round and wrinkled seeds.
| Dominant trait | Recessive trait | No. of F2 offspring |
| Round seeds | Wrinkled seeds | 7524 |
From these results, it can be concluded that the actual number of round seeds he obtained was ______
Answer the following question.
Why are the traits acquired during the life-time-of-an individual not inherited? Explain.
