Question

Hemophilia is an x-linked recessive disease. Under which of the following conditions will a female child inherit hemophilia?

Both parents must have the hemophilia allele.

Only the father must have the hemophilia allele.

Both sets of grandparents must have the hemophilia allele.

Only the mother must have the hemophilia allele

Answer 1

A female has X X chromosomes, so in order for her to inherit hemophilia, her alleles must be both affected or else she will only be a carrier

that means both parents must have the hemophilia allele