After reaching homozygosity, the species develop homozygous balance and fail to exhibit inbreeding depression.
Mechanisms that promote self-pollination include homogamy, bisexuality, cleistogamy, the position of anthers, and chasmogamy.
The persistent prevalence of allogamy throughout different species implies that this strategy provides selective advantages concerning adaptation to changing environments and sustaining fitness.
[10] Allogamy ordinarily involves cross-fertilization between unrelated individuals leading to the masking of deleterious recessive alleles in progeny.
[14] Thus post-pollination selection may occur in order to promote allogamy and avoid inbreeding depression.