Which of the following crosses will yield only homozygous recessive offspring?
A)RRYY * RRYY
B)RRYY *rryy
C)RrYy * rryy
D)rryy *rryy
E)RrYy *RrYy

Question

Quizplus · Accepted Answer

In order to yield only homozygous recessive offspring, both parents must be heterozygous for the same trait. Therefore, in cross D, both parents are homozygous recessive (rryy), ensuring that all offspring will also be homozygous recessive for that trait.

Which of the Following Crosses Will Yield Only Homozygous Recessive