If a light-eosin eye male Drosophila is crossed to a homozygous red eyed female, what will be the phenotype of their offspring?
A) All offspring will have red eyes.
B) All males will have light-eosin eyes and all females will have eosin eye
C) All females will have red eyes, all males will have light-eosin eyes.
D) All flies will have white eyes.

Question

Quizplus · Accepted Answer

The male parent has a recessive allele for light-eosin eyes, while the female parent has two dominant alleles for red eyes. All offspring will inherit one dominant allele for red eyes from the female parent, and one recessive allele for light-eosin eyes from the male parent. This will result in all offspring having red eyes, as the dominant allele for red eyes will mask the recessive allele for light-eosin eyes.

If a Light-Eosin Eye Male Drosophila Is Crossed to a Homozygous