What is Sex?
Organisms of many species are specialized into male and femalevarieties, each known as a sex.Sexual reproduction involves the combining and mixing of genetictraits: specialized cells known asgametes combine to form offspring that inherit traits from each parent. Gametes can be identical in form and function (known as isogamy), but in many cases an asymmetry has evolved such that two sex-specific types of gametes (heterogametes) exist (known asanisogamy). By definition, male gametes are small, motile, and optimized to transport their genetic information over a distance, while female gametes are large, non-motile and contain the nutrients necessary for the early development of the young organism. Among humans and other mammals, males typically carry XY chromosomes, whereas females typically carry XX chromosomes, which are a part of the XY sex-determination system.
The gametes produced by an organism determine its sex: males produce male gametes.