In a dihybrid cross between two heterozygous individuals, what is the expected phenotypic ratio in the F2 generation?

Answer: A

9 : 3 : 3 : 1

Why

Two genes assorting independently, each heterozygous, produce four gamete types in equal frequency. The 4x4 Punnett square gives 9 both-dominant, 3 dominant-recessive, 3 recessive-dominant and 1 both-recessive.