Hemophilia has an X-linked recessive pattern. It is carried on the “X” chromosome. It is only expressed phenotypically as homozygous recessive in women but men that inherit the affected chromosome will suffer from the disorder. A carrier woman (one affected X chromosome) married a man with hemophilia, and they have children. What percent of their boy children will be affected with hemophilia?
a. None.
b. 100% of the boy children.
c. 50% of the boy children.
d. 25% of the boy children.
Ans: c. 50% of the boy children.
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