Meaning of Y CHROMOSOME

WordNet Dictionary
	Definition:		[n]  the sex chromosome that is carried by men; "human males normally have one X chromosome and one Y chromosome"
	See Also:		sex chromosome
Biology Dictionary
	Definition:		A sex chromosome found in humans, fruit flies, and certain other animals where the male is the heterogametic sex. The Y chromosome causes the individual to become male in most mammal species and carries few other genes besides those dictating sperm development and triggering appropriate hormonal output. It is part of the XY set of sex chromosomes, where the male has only one X chromosome and usually a Y chromosome (fruit fly males can also have just one X and nothing else), and the female has two X chromosomes.
Glossary
	Definition:		One of the two sex chromosomes, X and Y. the smaller of the two sex chromosomes. Normal females possess no Y chromosome; normal males possess one X and one Y chromosome.