haemophilia is a sex-linked hereditary blood clotting dis purchase order. The bloods softness to clot results in excessive bleeding, even from sylphlike injuries. The malady is caused by a lack of blood proteins, c both(prenominal)ed elements, which participate in blood clotting. There are terzetto types of haemophilia; haemophilia A, B and C. Hemophilia A is the most(prenominal) reciprocal roll of the complaint and is found in 80 pct of both haemophiliacs. It is caused by a lack of agent VIII. The present moment most common form is bleeders disease B, which is caused by the absence seizure of factor IX. Twenty percent of the quite a little with this disease bear hemophilia B. Hemophilia C is caused by the lack of factor XI and however a small percentage of the people with the disease have this. The gene for hemophilia is located on the X chromosome. Hemophilia is a recessive sex-linked trait. Males to a greater extent ordinarily get hemophilia because they only need to inherit wizard bad X chromosome, whereas women need to inherit two. Hemophilia A and B almost always occur in boys and hemophilia C can occur in both boys and girls. iodin in 10,000 men have hemophilia A or B. The disease is passed from mother to son through cardinal of the mothers genes. near womanlys who have the defective gene are only carriers and attest no signs of the disease. Of the children of a pistillate carrier and a shape male, one fractional of the boys will have hemophilia and half of the girls will be carriers. Of the children of a ordinary female and a male hemophiliac, all of the boys will be normal and half of the girls will be carriers. Of the children of a hemophiliac female and a normal male, all of the boys will have hemophilia and all of the girls... If you want to get a full essay, order it on our website: OrderCustomPaper.com
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