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hemophilia: hereditary transmission 
(A) Mating of affected hemophilic man and normal woman—all sons normal, all daughters carriers. (B) Mating of carrier woman and normal man—half of sons normal and half affected; half of daughters carriers, half normal.
Encyclopædia Britannica, Inc.
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hemophilia (Encyclopædia Britannica) hereditary bleeding disorder caused by a deficiency of a substance necessary for blood clotting (coagulation). In hemophilia A, the missing substance is factor VIII. The increased tendency to bleeding usually becomes noticeable early in life and may lead to severe anemia or even death. Large ...
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