In the extent of the biology, the members of most of the alive beings' of the domain species Eucariota are divided in two
or more called
categories of sexes.
These categories refer to complemental groups that can combine the respective genetic material - usually DNA - through the conjugation. This process is called of reproduction sexuada. Usually, a species has two sexes: masculine and feminine. The feminine sex is defined as that that produces the gâmeta (or gameta, the reproductive cell) larger and usually immobile - the ovum. However, there are species with more than two sex types and other, as some mushrooms, that develop structures seemingly similar where sexual cells are produced, but with capacity to conjugate. In these cases, it is said that the sex is indiferenciado. The word sex is also used to refer to the sexual organs, to the sexual relationship (the physical actions related with the reproduction sexuada) and other behaviors of the human
sexuality.