Sex is a tricky business, evolutionarily speaking. One problem is that sexually reproducing organisms must suffer the considerable faff of securing a mate (for the males of some species, the struggle ...

Which group of mammals has the more 'primitive' reproductive strategy -- marsupials, with their short gestation periods, or humans and other placental mammals, which have long gestation periods? For ...

Live mouse progeny can be generated with assisted reproduction using germ cells from males without any Y chromosome genes. In these males, the two Y genes previously demonstrated to be essential for ...

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