Solve this genetics problem. In humans, the condition for normal blood clotting (H) dominates the condition for nonclotting or hemophilia (h). Both alleles are linked to the X Chromosome and it is common to use the notation X and h to link sex-linked traits to the X chromosome.
A boy with chromosomes XY has hemophilia, but neither his parents nor his grandparents have the condition. What are the genotypes of his parents? What are the genotypes of his mother's parents (his maternal grandparents)? Show using a diagram and explain why you think what you think (Assume all women listed are chromosomal XX and all men/boys are chromosomal XY)