Go to MSN Homeencarta®
Dictionary
Find
in
Dictionary
Thesaurus
Translations
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Click to move up the list of words
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
Click to move down the list of words
Also available:

U.S. English Dictionary
Dictionnaire Français

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)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
Advertisement
© 2009 Microsoft