Red-green color blindness is inherited as a sex-linked recessive trait.The gene is found on the X chromosome.How can a man with normal color vision father a daughter who is red-green color-blind?
A) The woman with whom he mates is red-green color-blind.
B) The man is heterozygous for red-green color blindness.
C) He can't (unless there is a mutation).
D) The man's mother carries an allele for red-green color blindness, and the expression of the trait skipped a generation.

Question

Quizplus · Accepted Answer

A man with normal color vision cannot pass on the red-green color blindness allele to his daughter unless there is a mutation, because he would only pass on a normal X chromosome.

Red-Green Color Blindness Is Inherited as a Sex-Linked Recessive Trait