If shape and color of radishes are both due to genes with incompletely dominant alleles, crossing two dihybrid heterozygotes will produce how many different phenotypes?
A)2
B)3
C)4
D)5
E)9

Question

Quizplus · Accepted Answer

Incompletely dominant alleles result in a blending of traits, and crossing two dihybrid heterozygotes (AaBb x AaBb) can produce 3 phenotypes for each trait. Since there are two traits, the total number of different phenotypes is 3 (for shape) x 3 (for color) = 9.

If Shape and Color of Radishes Are Both Due to Genes