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XXXY |
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XXXY, XXXXY, XXYY [thrē′ekswī, fôr′ekswī, dob′əleks′-dob′əlwī′] the designations for abnormal sex chromosome complements in the human male in which there are more than the normal one X and one Y chromosome, resulting in a total of 48, 49, or more chromosomes in each somatic cell. The aberration is a variant of Klinefelter's syndrome. In general, the more X chromosomes there are, the greater the number of congenital defects and the severity of mental retardation in the affected individual. See also Klinefelter's syndrome. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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XXXX syndrome XXXXX syndrome XXXY XXXY males XXXY syndrome XXY XXY syndrome XXYY XY XY gonadal agenesis syndrome XY sex reversal mares XY/XXY mosaic xylan xylazine xylene |
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