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May 22, 2013
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Definition of Z chromosome

Z chromosome: A sex chromosome in certain animals, such as chickens, turkeys, and moths. In humans, males are XY and females XX, but in animals with a Z chromosome, males are ZZ and females are WZ.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=6249
Last Editorial Review: 4/27/2011 5:27:15 PM

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