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Essay Galaxy - Haemophilia
Haemophilia
In the human body, each cell contains 23 pairs of chromosomes, one of
each pair inherited through the egg from the mother, and the other
inherited through the sperm of the father. Of these chromosomes, those that
determine sex are X and Y. Females have XX and males have XY. In addition
to the information on sex, 'the X chromosomes carry determinants for a
number of other features of the body including the levels of factor VIII
and factor IX.'1 If the genetic information determining the factor VIII and
IX level is defective, haemophilia results. When this happens, the protein
factors needed for normal blood clotting are effected. In males, the single
X chromosome that is effected cannot compensate for the lack, and hence
will show the defect. In females, however, only one of the two chromosomes
will be ....
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Number Of Pages: 5 |
Number Of Words: 1139 |
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