Reproduction in animals varies from species to species. Some types of reproduction, like parthenogenesis, are more unusual ...

(Mutations do create a minor amount of change.) If asexual reproduction survives at all, conditions must sometimes favor it, even in competition for a niche with sexually reproducing species.

Sexual reproduction is by far the most common ... Whereas human males inherit two different kinds of sex-determining chromosomes (the so-called XY chromosomes), in Komodo dragons it’s the ...

Those outlier liaisons gave whiptails robust heterozygosity, which has been preserved by the identical replication—essentially, cloning—that occurs in asexual reproduction. It’s a genetic ...

The finding may offer insight into a long standing question in evolutionary biology about what forces cause species to choose sex over asexual reproduction and vice versa, he said. On paper, ...

The Amazon molly (Poecilia formosa) is a species of freshwater fish native to Mexico and the southwestern United States. The fish—like their namesake, the mythical Amazonian warriors—are all female.