1. HEMOPHILIA Most people's blood clots normally. Hemophilia is a blood disorder that causes blood not to clot properly. The allele for hemophilia is recessive to the allele for normal blood clotting.

These alleles are located on the human X chromosome. The Y chromosome is a genetic
"blank" for this trait; it contains no allele for the blood-clotting gene.
(A number of cases of hemophilia have occurred among male descendants in the
family of England's Queen Victoria. She, however, did not have hemophilia.
Queen Victoria lived during the time of Charles Darwin.)
a. Show the genotypes of parents that would produce a male descendant with
hemophilia (when the mother does not have hemophilia).
b. Show the genotype required of parents to produce a hemophiliac daughter.
c. Explain what's wrong with the statement "That hemophiliac man's father was also a
hemophiliac, so he must have inherited the disease from his father."