The ratio of phenotypes among the offspring of a dihybrid cross is _____.
A)9:3:3:1
B)3:2:1
C)1:1
D)1:2:1
E)4:2:4

Question

Quizplus · Accepted Answer

A dihybrid cross involves the inheritance of two different genes with two possible alleles each, resulting in four possible gametes from each parent. When these gametes combine, the resulting offspring can have various combinations of the alleles. The 9:3:3:1 ratio is obtained when both parents are heterozygous for both genes being crossed. This ratio represents the four possible phenotypes that can result from the combination of these alleles.

The Ratio of Phenotypes Among the Offspring of a Dihybrid