Red-green color blindness is an X-linked recessive disorder. Assume that a mother is a carrier and a father is color-blind. What is the chance that their son will inherit red-green color blindness?
A) 0%
B) 25%
C) 50%
D) 75%
E) 100%

Question

Quizplus · Accepted Answer

Since the mother is a carrier (X^RX^r) and the father is color-blind (X^rY), the son will inherit one X chromosome from the mother and one Y chromosome from the father. There is a 50% chance the son will inherit the X^r from the mother, resulting in color blindness.

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