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X-chromosome |
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X-chromosome the sex chromosome that occurs in pairs in the diploid cells of the females of many animals, including humans, and as one of a pair with the Y-chromosome in those of males 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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The study was small, he said, and most of the mothers of multiple gay sons didn't share the unusual X-chromosome trait. David Nelson, an X-chromosome expert at the Baylor College of Medicine, described the map produced by Schlessinger's team as a ``tour de force. His analyses of tissue samples from spontaneously aborted fetuses revealed a surprising number of trisomies (cells containing double contributions from one parent in addition to a normal complement of chromosomes from the other parent) and X-chromosome monosomies (cells containing one, rather than two, sex chromosomes). |
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