The behavior of sperm cells is due, in part, to the individual DNA make-up of these cells, rather than only to the genetics of males. The results, which provide a new understanding of the competition ...

Genetic quality or genetic compatibility? What do female fruit flies prioritize when mating? Researchers show that both factors are important at different stages of the reproductive process and that ...

Some animals are capable of parthenogenesis, a reproductive process in which females produce offspring without fertilization. This phenomenon has been documented in reptiles, sharks, birds, and ...