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when is a man not an XY?

We all know that a person is male because he has XY chromosomes. But is this always the case? Sometimes, a male has an extra chromosome--he's an XXY, and is said by some to have Klinefelter Syndrome. This site provides comprehensive information on this condition, including the physical and behavioral characteristics common to Klinefelter males (such as a more feminine build and body-hair pattern, as well as learning disabilities). Don't miss the XXY men's stories at http://www.globalwebsol.com/vv/XXYPerspectives.html ; they provide an interesting perspective on the challenges created by this chromosomal variation, and the treatments that are available. There's some great sources of additional information in the links area, so if you want to know more, don't forget to head there.

Wed, 19 Jan 2000 07:32:03 -0800