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Klinefelter Syndrome Essay Preview: Klinefelter Syndrome Report this essay Causes Humans have 46 chromosomes. Chromosomes contain all of your genes and DNA, the building blocks of the body. The two sex chromosomes determine if you become a boy or a girl. Females normally have two XX chromosomes. Males normally have an X and a Y.
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Cell DivisionExtra X ChromosomeFormation Of Reproductive CellsKlinefelter Syndrome