A pure yellow-seeded pea plant is hybridised with a pure green-seeded pea plant. If the pea plants
produced in the first filial generation are selfed, then in second filial generation-
(a) Half of the pea plants will have yellow seeds and half will have green seeds
(6) All the pea plants will have green seeds
(C) 3/4" pea plants will have yellow seeds and 1/4th pea plants will have green seeds
(d) All the pea plants will have yellow seeds
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Explanation:
a is the answer
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The correct option is- (C) 3/4th pea plants will have yellow seeds and 1/4th pea plants will have green seeds.
- Out of the seven contrasting characters that Mendel studied in pea plants, one was seed color in which yellow color seed (Y) was dominant trait while green color seed (y) was recessive trait. Recessive trait is expressed only in homozygous conditions (yy).
- When yellow seeded pea plant (YY) is crossed with green seeded plant (yy) then in the F1 generation, all progeny will have yellow seeds with a genotype Yy.
- When F1 generation plants are selfed, then in F2 generation, the plants obtained will have a phenotypic ratio of 3:1. This means out of four, three plants will have yellow seeds and one will have green seeds. This is because the green seed color trait that was not visible in F1 generation is now expressed in F2 generation.
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