Answer # 3
need quick response

Okay!  Hemophilia itself is a disorder that slows the blood clotting process, this allows for people to bleed for a long period of time after minor trauma or other things.  There are multiple types of hemophilia like hemophilia A, and hemophilia B but they are pretty similar so that should not matter much!  Hemophilia itself is a result of changes in the F8 gene (this gene provides instructions for making the protein coagulation factor VII), for Hemophilia A, whilst in hemophilia B the F9 Gene (coagulation factor IX).  These mutations in the F8 and F9 gene make the clotting that would normally happen as a result, be a lot slower and would not allow for a proper clot to be formed in response to a injury, and could even completely eliminate the F8 and F9 gene from a persons system, which is you know kinda bad.  So basically, a personw ith hemophilia has a mutation on there F8/F9 gene reducing and damaging the ability to produce coagulation factor VIII/coagulation factor IX causing the inability to form proper clots.  Whilst a person that would not would have normal DNA would not have these mutations in the F8/F9 gene and thus would have the proper amounts of the protein to form a proper clot.

That would be a working theory.