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Haemophilia A What Is Haemophilia A? Haemophilia A is a genetic blood disorder, in which the blood fails to clot as the clotting mechanism is affected by a faulty gene. If an affected person has a cut, they will bleed continuously until they are treated. They can also bleed internally and in extreme cases this can cause death, but this is rare as treatment is given to haemophilia sufferers. Males are affected by this condition and females can only be carriers. What causes haemophilia A? Haemophilia is caused by a defective or missing gene. This gene is known as the factor V111 gene. It is linked to the X chromosome. Females have two X chromosomes the chromosome which carries the gene that has the mutation is referred to as the recessive gene, the healthy gene in the other X chromosome will hold all the information and over ride the recessive gene, and this is...

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