Haemophilia is a group ofhereditary genetic disorders that impair the body's ability to control blood clotting or coagulation, which is used to stop bleeding when ablood vessel is broken. It is more likely to occur in males than females. Why? It is because females have two X chromosomes while males have only one, so the defective gene is guaranteed to manifest in any male who carries it. The chance of a female having two defective copies of the gene is very low, so females are almost exclusively asymptomatic carriers of the disorder. Female carriers can inherit the defective gene from either their mother or father, or it may be a new mutation. Only under rare circumstances do females actually have haemophilia.
Resources from: Wikipedia.com
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