Q J Med 2004; 97: 57-58
© Association of Physicians 2004; all rights reserved.
Biologic |
Why?
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Until closely studied, the human Y chromosome had been identified as the home of relatively few genes: the IEAT (Inability to Express Affection on the Telephone), HUH (selective hearing loss), and Flip (rapid TV channel selection) genes were among the few examples. More detailed and serious examination has revealed a great deal more. Y is not essential, about half of it consists of tandemly repeated satellite DNA, and it carries few genes, most of which do not recombine. Nonetheless, it can tell us a lot about ourselves.
Most of the Y escapes meiotic recombination (two segments do recombine with the X,