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y-chromosome

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Y chromosome

 
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–noun Genetics.
a sex chromosome of humans and most mammals that is present only in males and is paired with an X chromosome.
Compare X chromosome.

Origin:
1920–25
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Y-chro·mo·some or Y chromosome   (wī'krō'mə-sōm')
n.  The sex chromosome associated with male characteristics in mammals, not occurring in females and occurring with one X-chromosome in the male sex-chromosome pair.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: Y chromosome
Pronunciation: 'wI-
Function: noun
: a sex chromosome that is characteristic of male cells in species in which the male typicallyhas two unlike sex chromosomes —compare X CHROMOSOME
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

Y-chromosome n.
The sex chromosome associated with male characteristics, occurring with one X-chromosome in the male sex chromosome pair.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
Y-chromosome  
The sex chromosome that is paired with an X-chromosome in males. Most of the genes on the X-chromosome determine physical attributes associated with males, such as the development of testes. See more at sex chromosome. See Note at sex.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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