Definition of Y chromosome
1. Noun. The sex chromosome that is carried by men. "Human males normally have one X chromosome and one Y chromosome"
Definition of Y chromosome
1. Noun. (genetics) A mammalian sex chromosome, occurring only in male cells. Cells of females have a pair of X chromosomes while cells of males have an X and a Y. ¹
¹ Source: wiktionary.com
Medical Definition of Y chromosome
1.
The small chromosome that is male-determining in most mammal species and found only in the heterogametic sex. Thus in mammals the male has one Y chromosome and one X chromosome. One region of the Y chromosome, the pseudoautosomal region, is homologous to and pairs with the X chromosome. The primary determinant of male sexual development is found on the unpaired, differentiated segment of the Y chromosome. It carries few other genes besides those dictating sperm development and triggering appropriate hormonal output.
This entry appears with permission from the Dictionary of Cell and Molecular Biology
(11 Mar 2008)
Lexicographical Neighbors of Y Chromosome
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