Question

In Mendel's experiments with garden pea, round seed shape (RR) was dominant over wrikled seed (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the $F_{2}$ generation of the cross R R Y Y- rryy?

• A. round seeds with yellow cotyledons, and wrinkled seeds with yellow cotyledons
• B. only round seeds with green cotyledons
• C. only wrinkled seeds with yellow cotyledons
• D. only wrinkled seeds with green cotyledons

Answer 1

Answer: (A)

round seeds with yellow cotyledons, and wrinkled seeds with yellow cotyledons

Answer 2

Since round seed shape is dominant over wrinkled seed shape and yellow cotyledon is dominant over green cotyledon so RRYY individuals is round yellow and rryy is wrinkled green.