OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If Y is a dominant allele for yellow in a plant and y is the recessive allele for green in a plant, what genotype would green offspring have?
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YY
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Yy
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yy
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yY
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Explanation:
Detailed explanation-1: -Let’s suppose that the allele for yellow seed is Y and that for green seeds is y. Hence the genotype of the heterozygous yellow seeded plant will be “Yy” and that for green seeded plant will be “yy” (as the recessive allele is expressed only in homozygous conditions).
Detailed explanation-2: -In pea, yellow seed colour is dominant over green colour. Heterozygous yellow seeded plant is crossed with green seeded plant.
Detailed explanation-3: -The cross between heterozygous yellow seeded plant and green seeded plant will produce 50% yellow seeded plants and 50% green seeded plants.
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