Punnett square problem.

Red-green color blindness in humans is sex linked and recessive. If a male with normal vision marries a woman who is (red-green) color blind:

a. the probability that each daughter will be color blind is 50%

b. the probability that each son will be color blind is 50%

c. the probability that each daughter will be color blind is 0%

d. the probability that each son will be color blind is 0%

e. the probability that each daughter will be color blind is 100%

So do the Punnett Square.
..
..

XY x XcXc
offspring are XXc, XXc. YXc, YXc. All girls are carriers and all boys are afflicted.


> a. the probability that each daughter will be color blind is 50%
False. 0%

b. the probability that each son will be color blind is 50%
False. 100%

c. the probability that each daughter will be color blind is 0%
True.

d. the probability that each son will be color blind is 0%
False. 100%

e. the probability that each daughter will be color blind is 100%
False. 0%

b and c both are correct answers.The daughters will not be color blind but they are carriers because they got one dominant allele from father & recessive one from mother.All the boys are affected with color blindness because they have only one x chromosome and it had come from their mother.