Term Name:	Y chromosome
Synonyms:
Definition:	The sex chromosome present in males of species in which the male is the heterogametic sex; generally, the sex chromosome that pairs with the X chromosome in the heterogametic sex. The Y chromosome is absent from the cells of females and present in one copy in the somatic cells of males.
Ontology:	GO: Cellular Component [GO:0000806]    QuickGO    AmiGO