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ABCDEFGHIJKLMNOPQRSTUVWXYZ
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WYSIWYG
wyvern
X (1)
X (2)
x (1)
x (2)
x-axis
X-certificate
X chromosome
x-coordinate
x-height
X-inactivation
x out
X-radiation
X-rated
X-ray
X-ray astronomy
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X chromosome
X chromosome (plural X chromosomes)


noun 
Definition:
 
sex chromosome: a chromosome present in both sexes that plays a role in determining the sex of an individual. Female mammals carry two X chromosomes and males carry one.
See also  Y chromosome
Encarta® World English Dictionary [World English Edition] © & (P)2008 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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