Host resistance does not explain variation in incidence of male-killing bacteria in Drosophila bifasciata
Abstract Background Selfish genetic elements that distort the sex ratio are found widely.Notwithstanding the number of records of sex ratio distorters, their incidence is poorly understood.Two factors can prevent a sex ratio distorter from invading: inability of the sex ratio distorter to function (failure of mechanism or transmission), and lack of