Question

A man who is color-blind marries a woman who is not color-blind and is not a carrier of the allele for color blindness.

Question 1: How many of the female children could be carriers of the allele for colorblindness? Explain.

Question 2: Is it possible for these parents to have a color blind son? Explain.

Answer 1

Answer 1: Since the mother is not a carrier of the allele for color blindness, none of the female children can be carriers.

Answer 2: No, it is not possible for these parents to have a color-blind son. The mother must have the allele for color blindness, and since she does not carry the allele, she cannot pass it on to her son.