One Form of Hemophilia Is Caused by a Sex-Linked Recessive

question 19

Multiple Choice

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?

• A) 1/16
• B) 1/8
• C) 1/4
• D) 1/2
• E) 3/4

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