A boy with hemophilia was born into a family of healthy parents. What are the genotypes

A boy with hemophilia was born into a family of healthy parents. What are the genotypes of the parents (hemophilia h gene)?

Correct answer: d) mother of XH Xh, father of XH Y.

XH Xh’s mother is healthy and carries a pathological gene. It produces two types of eggs – XH and Xh. Father XH Y is healthy and produces two types of sperm – XH and Y.

Their theoretically possible offspring will be represented by the following options:

healthy boys (XH Y) – 25%;

healthy homozygous girls (XH XH);

healthy girls who are carriers of a pathological gene (XH Xh);

boys with hemophilia (Xh Y) – 25%.