One form of hemophilia is caused by a sex -linked recessive gene. Assume that a man with hemophilia marries a phenotypically normal woman whose father had hemophilia. What is the probability that their first son will have hemophilia?

Question

Quizplus · Accepted Answer

The mother is a carrier (XHXh) since her father had hemophilia. The father has hemophilia (XhY). The probability of having a son is 1/2, and the probability that the son inherits the Xh from the mother is also 1/2, resulting in a 1/2 probability that the son will have hemophilia.

One Form of Hemophilia Is Caused by a Sex -Linked