Color blindness is X-linked recessive and blood type is
autosomal. If two parents who are both Type A and have normal
vision produce a son who is color blind and type O, what is the
probability that their next child will be a son who has normal
vision and is blood type A?
Answer Choices
A) 0 B) 1/8 C) 1/4 D) 3/16 E)1