sex chromosome

sex chromosome

noun Genetics.
a chromosome, differing in shape or function from other chromosomes, that determines the sex of an individual.

Origin:
1910–15

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World English Dictionary
sex chromosome
 
n
X-chromosome See also Y-chromosome either of the chromosomes determining the sex of animals

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

sex chromosome n.
Either of a pair of chromosomes, usually designated X or Y, that combine to determine the sex and sex-linked characteristics of an individual, with XX resulting in a female and XY in a male.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
sex chromosome  
Either of a pair of chromosomes, usually called X and Y, that in combination determine the sex of an individual in many animals and in some plants. In mammals, XX results in a female and XY in a male, while the opposite is true in birds (where the designations ZW for female and ZZ for male are often used). Sex chromosomes carry the genes that control the development of reproductive organs and secondary sex characteristics. In some organisms, sex is determined by environmental influences. See also X-chromosome, Y-chromosome.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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