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A woman who is a carrier for hemophilia, a sex-linked recessive trait, marries a man who is normal. If they have a son, what is the probability that the son will have hemophilia?

Respuesta :

Answer AND Explanation:

Let H be for normal blood clotting gene.

               XH            Xh

XH         XHXH      XHXh

Y            XHY          XhY

The probability of the couple having a hemophilia sex-linked trait is 25% and 75% for normal children.