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Y chromosome
Y chromosome (plural Y chromosomes)


noun 
Definition:
 
male sex chromosome: the sex chromosome that determines the male sex in humans and other mammals. The body cells of males each possess one Y chromosome paired with one X chromosome.
See also  X chromosome
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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