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W chromosome |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.05 sec. |
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W chromosome [′dəb·əl‚yü ‚krō·mə‚sōm] (genetics) The sex chromosome present only in females in species with female heterogamety. 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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For instance, in mammals, a tiny Y sex chromosome and a big X yield a male and two Xs make a female, but birds live in a mirror-image world where a big Z chromosome pairs with a tiny W chromosome to yield a female and two Zs make a male. |
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