Have one or two extra sex chromosome(s)
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Have one or two extra sex chromosome(s)
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Klinefelter syndrome is a sex chromosome disorder in boys and men that results from the presence of an extra X chromosome in cells.
Females have two X chromosomes (46,XX), and males have one X and one Y chromosome (46,XY).
Cells with two additional sets of chromosomes, for a total of 92 chromosomes, are called tetraploid. A condition in which every cell in the body has an extra set of chromosomes is not compatible with life.
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