question_answer

In Mendel's experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the\[{{F}_{2}}\]generation of the cross\[\text{RRYY }\!\!\times\!\!\text{ rryy}\]?

A)  Only round seeds with green cotyledons

B)  Only wrinkled seeds with yellow cotyledons

C)  Only wrinkled seeds with green cotyledons

D)  Round seeds with yellow cotyledons, and wrinkled seeds with yellow cotyledons