Chapter 4.5, Problem 2COMQ

Hemophilia is a blood-clotting disorder in humans that follows an X-linked recessive pattern of inheritance. A man with hemophilia and a woman without hemophilia have a daughter with hemophilia. If you let H represent the normal allele and h the hemophilia allele, what are the genotypes of the parents?

a. Mother is ${\text{X}}^{\text{H}}{\text{X}}^{\text{h}}$ and father is ${\text{X}}^{\text{h}}\text{Y}\text{.}$

b..Mother is ${\text{X}}^{\text{h}}{\text{X}}^{\text{h}}$ and father is ${\text{X}}^{\text{h}}\text{Y}\text{.}$

c. Mother is ${\text{X}}^{\text{h}}{\text{X}}^{\text{h}}$ and father is ${\text{X}}^{\text{H}}\text{Y}$.

d. Mother is ${\text{X}}^{\text{H}}{\text{X}}^{\text{h}}$ and father is ${\text{X}}^{\text{H}}\text{Y}\text{.}$