If two genes control a trait and each has a dominant and a recessive allele,there are ____ phenotypic classes in the F2 generation.
A) three
B) five
C) nine
D) sixteen
E) thirty-two

Question

Quizplus · Accepted Answer

When two genes each with a dominant and recessive allele control a trait, the combination of these alleles in the F2 generation can produce a 9:3:3:1 phenotypic ratio, which results in five distinct phenotypic classes.

If Two Genes Control a Trait and Each Has a Dominant