Chapter 14, Problem 6TYU

Hemochromatosis is an inherited disease caused by a recessive allele. If a woman and her husband, who are both carriers, have three children, what is the probability of each of the following?

(a) All three children are of normal phenotype.

(b) One or more of the three children have the disease.

(c) All three children have the disease.

(d) At least one child is phenotypically normal.

(Note: 1t will help to remember that the probabilities of all possible outcomes always add up to 1.)