Question

a couple has just learned tht their daughter has heophilia they already have a son who does not have the disease what are the genotypes of the couple explain your reasoning

Answer 1

If H represents the heophilia gene and h represents not having it, you could have Hh and Hh. If you use a Punnett square you get four possibilities of children: HH, Hh, Hh, and hh. Assuming the gene for having heophilia is dominant, the boy would be hh and the girl would be HH, Hh, or Hh. So this all comes from the assumption that the parents' genotypes are Hh and Hh.

Answer 2

Good explanation auroblue01, I gathered a lot from that

Answer 3

You're welcome :)