In peas,the round allele is dominant over the wrinkled allele.If a plant with round peas is crossed to a plant with wrinkled peas,all of the resulting plants have round peas.What is the genotype of the parents in this cross?
A)RR × rr
B)RR × Rr
C)Rr × rr
D)Rr × Rr
E)rr × rr

Question

Quizplus · Accepted Answer

The dominant allele for round peas is R, and the recessive allele for wrinkled peas is r. If a plant with round peas (RR) is crossed to a plant with wrinkled peas (rr), all of the resulting plants will have round peas (Rr). This is because the dominant allele R will mask the recessive allele r, resulting in a round pea phenotype.

In Peas,the Round Allele Is Dominant Over the Wrinkled Allele