Unformatted text preview: • Decreased libido Causes Klinefelter’s is caused by the presence of an additional X chromosome, however in rare cases in can be caused by up to three extra X chromosomes (XXXXY). Males with Klinefelter syndrome may have a mosaic 47 XXY/46 XY constitutional karyotype and varying degrees of spermatogenic failure. Mosaicism 47 XXY/46 XX with clinical features suggestive of Klinefelter syndrome is very rare. Thus far, only about 10 cases have been described in literature. The cause for additional X Chromosomes remains unclear; however it is observed that the incidence is found to be higher in children of elderly mothers....
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- Fall '10
- Anthropology, X chromosome, Y chromosome, Klinefelter, Klinefelter's syndrome