In the F2 generation of Mendel’s dihybrid cross between pea plants with genotypes RRYY (round yellow seeds) and rryy (wrinkled green seeds), what is the phenotypic ratio observed?

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1:1:1:1 (round yellow : round green : wrinkled yellow : wrinkled green)

3:1 (round : wrinkled)

9:3:3:1 (round yellow : round green : wrinkled yellow : wrinkled green)

1:2:1 (round yellow : wrinkled yellow : green)

answer is A.

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Detailed Solution

In the F2 generation of Mendel’s dihybrid cross between pea plants with genotypes RRYY (round yellow seeds) and rryy (wrinkled green seeds), the phenotypic ratio observed is 9:3:3:1 (round yellow : round green : wrinkled yellow : wrinkled green).

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