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Klinefelter's Disease
Men with Klinefelter’s Syndrome have an extra X
chromosome.Chromosomes are found in each cell of the human body. They
carry the genetic material that determines all human characteristics,
including hair colour, eye colour, height, and gender. In total, each
cell has 23 pairs of chromosomes (or a total of 46).
Of the 23 pairs of chromosomes, one pair are sex chromosomes. These
determine a person’s gender. One sex chromosome is inherited from mother
and the other from the father. Females always pass on an X chromosome,
but males can pass on an X or a Y chromosome. The normal male chromosome
arrangement is 46XY, but men with Klinefelter’s Syndrome have 47XXY. The
extra X chromosome can come from either parent.
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