Q. 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 F2- generation of the cross RRYY × 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
Explanation

When a cross (dihybrid) is made between plants bearing round yellow (RRYY) and wrinkled green (rryy) seeds, all the plants in F1-generation are with yellow round seeds (showing the genotype RrYy).

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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