Red-green color blindness is an X-linked recessive trait in humans.What is the probability that a color-blind woman and a man with normal vision will have a color-blind daughter?
A)100%
B)75%
C)50%
D)25%
E)0%

Question

Quizplus · Accepted Answer

A color-blind woman (X^cX^c) will pass one X^c chromosome to her daughter. A man with normal vision (XY) will pass his X chromosome to his daughter. Since the daughter will inherit one normal X chromosome from her father, she will be a carrier (X^cX) but not color-blind.

Red-Green Color Blindness Is an X-Linked Recessive Trait in Humans