Assuming a typical monohybrid cross in which one allele is completely dominant to the other,what ratio is expected if the F1s are crossed?
A)1:1
B)3:1
C)4:3
D)2:1
E)3:2

Question

Quizplus · Accepted Answer

If one allele is completely dominant to the other, the F1 generation will all be heterozygous (Aa). When these F1s are crossed, the expected ratio is 3:1 for dominant to recessive phenotypes, as seen in Mendel's famous pea plant experiments. Therefore, the best choice is B.

Assuming a Typical Monohybrid Cross in Which One Allele Is