In Mendel’s experiments with Garden Pea, round seed shape (RR) was dominant over wrinkled seed shape (rr) and yellow cotyledons (YY) was dominant over green cotyledons (yy). Phenotypes in F₂ generation RRYY × rryy include

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only round seeds with green cotyledons

round seeds with yellow cotyledons, wrinkled seeds with green cotyledons

only wrinkled seeds with green cotyledons

only wrinkled seeds with yellow cotyledons

answer is D.

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Detailed Solution

Phenotype ratio of Mendel dihybrid cross is 9:3:3:1. F₂ generation obtained have parental phenotypes as well as recombinants. The phenotypes observed in the F₂ generation are round and yellow (9): round and green (3): wrinkled and yellow (3): wrinkled and green (1).

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