Table 1.

Three biological situations where the evolution of supergenes has been proposed

Situation	Initial state	Genes involved		Disadvantages to recombinants
		First mutation	Second mutation
Batesian mimicry	Nonmimetic	Nonmimetic → mimetic	Modifier of mimicry pattern (mimetic→ improved mimetic)	Nonmimetic, but with the modifier of mimicry making individuals more conspicuous to predators
Sex‐determination	Cosexual (hermaphroditic or monoecious)	Male‐sterility (cosexual → female)	Female suppressor (cosexual → male)	Neuter (male sterile with suppressor of femaleness)
Distyly	Nondistylous	Changed stigma position	Changed anther position	Stigma and anther positions that encourage within flower self‐pollination