Suppose That Your Mother Has Albinism, Which Is a Recessive

Multiple Choice

Suppose that your mother has albinism, which is a recessive trait. Also suppose your father has cystic fibrosis, which is also caused by a recessive trait. And you learn that your father-in-law has albinism and cystic fibrosis. What are the odds that your first child will have either albinism or cystic fibrosis, but NOT both?

A) 3 in 8
B) 1 in 4
C) 1 in 8
D) 1 in 16