Question

In a family, a man with hemophilia, a genetic disorder where blood doesn't clot properly, marries a woman who is a carrier of the gene but does not express the disorder. What is the probability that their son will have hemophilia?

• A. 0\%.
• B. 25\%.
• C. 50\%.
• D. 75\%.

Hint:

Hemophilia is an X-linked recessive disorder. In such disorders, sons inherit their X chromosome from their mother and the Y chromosome from their father.