Question

A man and woman have a son who is color-blind, a recessive sex-linked trait carried on the X-chromosome, but neither parent is color-blind. The woman is now pregnant with their second child. Which of the following statements is true about the second child?
(A) A son will be color-blind because the mother is a carrier of the recessive allele.
(B) A daughter will be color-blind because the father is a carrier of the recessive allele.
(C) A son will be color-blind because the father’s mother must have been a carrier for the recessive allele.
(D) A daughter will not be color-blind. A man and woman have a son who is color-blind, a recessive sex-linked trait carried on the X-chromosome, but neither parent is color-blind. The woman is now pregnant with their second child. Which of the following statements is true about the second child?
(A) A son will be color-blind because the mother is a carrier of the recessive allele.
(B) A daughter will be color-blind because the father is a carrier of the recessive allele.
(C) A son will be color-blind because the father’s mother must have been a carrier for the recessive allele.
(D) A daughter will not be color-blind. @Biology

Answer 1

A and D