Hemophilia is a recessive trait carried on the X chromosome. What are the genotype and phenotype ratios of a cross between a normal woman who is a carrier for hemophilia and a man who is normal?
A man who has hemophilia and a woman who is a carrier have: a 25% (one in four) chance of having a son with hemophilia. a 25% chance of having a son with normal blood clotting.
