Question

Hemophilia is a sex-linked trait where XH
gives normal blood clotting and is dominant to the
hemophilia allele Xh
. What will be the results of mating between a normal (non-carrier) female and a
hemophiliac male?

Answer 1

Answer:

The eggs of the mother will all contain the normal X chromosome.

The sperm of the father will contain either the X chromosome with the mutation causing hemophilia or the Y chromosome.

All of the daughters inherit an X chromosome with the mutation from their father, and will be carriers.

All the sons inherit a normal X from the mother.