Red-green color blindness is an X-linked recessive disorder. A woman with normal vision whose father was colorblind has children with a man with normal color vision. What is the probability that their first child will be colorblind?
A)1/4
B)1/2
C)3/4
D)0
E)1

Question

Quizplus · Accepted Answer

The woman is a carrier of the colorblindness allele, as her father was colorblind. The man has normal color vision, so he does not carry the allele. The probability that their first child will be colorblind is 1/2 (50%), as the child can inherit the colorblindness allele from the mother.

Red-Green Color Blindness Is an X-Linked Recessive Disorder