Instances in which natural selection maintains genetic variation in a population over millions of years are thought to be extremely rare. We conducted a genome-wide scan for long-lived balancing ...

In humans, the pervasiveness of hard sweeps (that is, for strong selection to drive the rapid fixation of new mutations in particular populations) has been strongly argued against. As an alternative, ...

Case studies on several loci with sexually antagonistic alleles, identified by genetic and genomic approaches, reveal that sexual conflict leads to balancing selection to maintain both female-benefit ...