Awoman with normal blood clotting mates with a man who has hemophilia. their first child is a boy who has hemophilia. tests show that the father and son both have the same form of hemophilia, that it is x-linked, and that the boy has normal genetic inheritance. you can predict that if the couple has more children together, it is likely that

half of the boys and half of the girls will have hemophilia.

Explanation:

Haemophilia is a disorder in blood clotting. For example: When we cut off some part of our body and it starts to bleed, proteins (elements responsible for the growth and development of all body tissues) take action to stop the bleeding. This process is called coagulation. People with hemophilia do not have these proteins and therefore bleed more than normal.

Hemophilia is a genetic disease, ie, it is transmitted from parents to children at the time the child is born. In the case exposed in the question, we can see that father and son have X-linked hemophilia, while the mother has normal coagulation. For this reason, assuming that this couple has more children, half of the boys and half of the girls will have hemophilia, since the father has hemophilia and the mother has normal coagulation.