X-linked recessive inheritance pattern with carrier mother

Women can pass down X-linked recessive disorders such as Duchenne's muscular dystrophy. A woman who is a carrier of an X-linked recessive disorder has a 25 percent chance of having an unaffected son, a 25 percent chance of having an affected son, a 25 percent chance of having an unaffected daughter and a 25 percent chance of having a daughter who also is a carrier.
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