Hemophilia is a sex- linked recessive gene that causes a blood disorder. What are the chances that the daughter of a normal man and a heterozygous woman will have hemophilia?

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Hemophilia is a sex-linked recessive disorder carried on the X chromosome. A normal man (XY) cannot pass the hemophilia gene to his daughters, and a heterozygous woman (XHXh) can pass either the normal or the hemophilia gene. The daughter would need two copies of the hemophilia gene to express the disorder, which is not possible with a normal father.

Hemophilia Is a Sex- Linked Recessive Gene That Causes a Blood