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प्रश्न
How did Mendel interpret his results to show that traits may be dominant or recessive? Describe briefly.
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उत्तर
Mendel interpreted his results by observing the first and second filial generations. He observed that even when not expressed in the first filial generation, alternate forms of a trait could retain their identity in the hybrid and could re-emerge in the next generation. He concluded that each factor contained information about a form of a trait.The factor associated with the trait that was expressed in the hybrid offspring was dominant and the factor associated with the trait that remained hidden in the hybrid but reappeared in the next generation was recessive.
संबंधित प्रश्न
What is a gene?
List any two contrasting characters other than roundness of pea plants that Mendel used in his experiments with pea plants.
How did Mendel explain that it is possible that a trait is inherited but not expressed in an organism?
Give the contrasting traits of the following characters in pea plant and mention which is dominant and which is recessive:
Yellow seed
Which of the following statement is incorrect?
(a) for every hormone there is a gene
(b) for every protein there is a gene
(c) for production of every enzyme there is a gene
(d) for every type of fat there is a gene
Pure-bred pea plants A are crossed with pure-bred pea plants B. It is found that the plants which look like A do not appear in F1 generation but re-emerge in F2 generation. Which of the plants A and B are : (i) tall, and (ii) dwarf? Give reason for your answer.
Explain the mechanism of hereditary changes.
What are the components of the DNA molecule?
If a tall pea plant is crossed with a pure dwarf pea plant then, what percentage of F1 and F2 generation respectively will be tall?
Mendel crossed pea plants with two pairs of contrasting characters.
| RRYY | × |
rryy |
| Round, Yellow | Wrinkled, Green |
He observed 4 types of combinations in F2 generation. Which of the combinations were new? Write the conclusion drawn by this experiment.
