Question

in morgans fruit fly experiments, whom exhibited white eyes among the f2 generations with a 3:1 red to white ratio? males hybrids females wild types

Explanation:

In Morgan's fruit fly experiments, the white - eye trait is X - linked recessive. In the F2 generation, with a 3:1 red - to - white eye ratio, the white - eyed individuals are males. Males have one X chromosome, so if they inherit the recessive allele for white eyes on their X chromosome, they will exhibit white eyes. Females need two copies of the recessive allele (one on each X chromosome) to show white eyes, and in the F2 generation of this experiment, the frequency of white - eyed females is much lower. Hybrids (heterozygotes) would have red eyes as the red - eye allele is dominant, and wild types typically have red eyes.

Answer:

A. males