A male (♂) organism is the physiological sex which produces sperm, and in most mammals typically has a y chromosome. Each spermatozoon can fuse with a larger female gamete or ovum, in the process of fertilization. A male cannot reproduce sexually without access to at least one ovum from a female, but some organisms can reproduce both sexually and asexually. Most mammal and human males have a Y chromosome, which produces testosterone to develop male reproductive organs.
Not all species share a common sex-determination system. In most animals including humans, sex is determined genetically, but in some species it can be determined due to social, environmental or other factors.
Tags: мужские обои для андроид , gameto femenino , fond décran adn chromosome , wallpapers masculino , el espermatozoide en 3d en 3d , андроид темы мужчины , sexo gratis en 3d con trolds , мужские и женские гаметы , 3d мужские обои на андроид