A man with color blindness (a sex-linked recessive trait) has children with a woman who is a carrier. What is the chance that a son will be color blind?
0%
25%
50%
100%
📝 Detailed explanation
Woman is $X^B X^b$, Man is $X^b Y$. Sons receive Y from the father and either $X^B$ (normal) or $X^b$ (color blind) from the mother. Probability is 50%.
