If R is dominant to r, the offspring of the cross of RR with rr will
A)be homozygous.
B)display the same phenotype as the RR parent.
C)display the same phenotype as the rr parent.
D)have the same genotype as the RR parent.
E)have the same genotype as the rr parent.

Question

Quizplus · Accepted Answer

If R is dominant to r, the RR individual will display the dominant phenotype. The rr individual will display the recessive phenotype. The offspring of the cross will all have a heterozygous genotype (Rr), but they will display the dominant phenotype (same as the RR parent) because the dominant allele masks the recessive allele. Therefore, the correct choice is B, as the offspring will display the same phenotype as the RR parent.

If R Is Dominant to R, the Offspring of the Cross