In order for a girl to inherit hemophilia A,her parents would have which genotypes?

Question

Quizplus · Accepted Answer

Hemophilia A is an X-linked recessive disorder, meaning that the gene is located on the X chromosome. Females typically have two copies of the X chromosome (XX), while males have one X and one Y chromosome (XY). In order for a female to inherit hemophilia A, she would need to receive a mutated hemophilia gene on both of her X chromosomes from her parents. 
In option B, the father has one X chromosome with the mutated gene (h), and one normal X chromosome (H), while the mother is a carrier, having one mutated X chromosome (h) and one normal X chromosome (H). When these two parents have a child, there is a 25% chance that the child will inherit mutated X chromosomes from both parents, resulting in hemophilia A. Option B represents this scenario.

In Order for a Girl to Inherit Hemophilia A,her Parents