Your mother has albinism, which is a recessive trait. Your father has cystic fibrosis, which is also a recessive trait. You discover that your new father-in-law has albinism and cystic fibrosis. If neither you nor your spouse has either albinism or cystic fibrosis, what are the odds that your first child will have neither albinism nor cystic fibrosis?
A) 1/16
B) 3/8
C) 1/8
D) 9/16
E) 0

Question

Quizplus · Accepted Answer

Since albinism and cystic fibrosis are both recessive traits, you and your spouse are carriers of both genes. The probability that your child will not inherit either condition is 3/4 (for not having albinism) * 3/4 (for not having cystic fibrosis) = 9/16.

Your Mother Has Albinism, Which Is a Recessive Trait