Annie Bauzon: Understanding the Genetics of Hemophilia
Annie Bauzon, Medical Laboratory Assistant Technician at Med Health Laboratories, shared a post on LinkedIn:
“Hemophilia is an inherited bleeding disorder in which the blood does not clot normally because of a deficiency of specific clotting factors.
Hemophilia A is caused by deficiency of factor VIII, while hemophilia B is caused by deficiency of factor IX.
These deficiencies can result in prolonged bleeding after injury or surgery and, in more severe disease, spontaneous bleeding into joints and other tissues.
Hemophilia A and B are inherited as X-linked disorders.
An affected father passes his abnormal X chromosome to all of his daughters, making them carriers, while he passes his Y chromosome to all of his sons.
The Y chromosome does not carry the hemophilia gene; the gene responsible for hemophilia is located on the X chromosome.
Therefore, when the mother is not a carrier, none of the sons inherit hemophilia from their father, and all daughters inherit the affected X chromosome and are carriers of the recessive gene.
Although all girls are carriers.”
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