Hemophilia is a negative genetic mutation because it causes a serious disease. Why do you think this gene mutation still persists in our genome?

Hemophilia is a recessive gene.

Explanation:

Recessive genes may be carried through several generations but are not express. Hemophilia is a sex link that travels in the X chromosome. If a male inherits an X chromosome he may express hemophilia. Women have a pair XX chromosomes and they may express the disease but is much rarer. If one of the X chromosomes contains the hemophilia gene but the other does not the disease does not appear.

It is a recessive trait, so women can be carriers and not know about it. Also, males who have the disease can still pass on the genes to their daughters, making them carriers.