Haploid all the way: a new style of asexuality revealed in animals.

Weeks et al(1) recently reported that they had found a species of mites where the parthenogenetic females are haploid. They show that this is caused by intracellular bacteria that turn genetic haploid males into haploid females. I discuss these findings and attempt to place these observations in evolutionary context. Copyright 2002 Wiley Periodicals, Inc.