How did a species with mechanism of incest prevention develop into a large population from initial a few members?
• The mechanism of incest prevention in some species can be considered as the outcome of NS. Every sexual species was born with similar genotypes and phenotypes with little variations. With proliferation of the species, they would become different with various characteristics. Some individuals might be inherently resistant to incest behaviors, some not. Offspring from incest act would have survival disadvantage and they were outnumbered by offspring from non-incest ones over the time, eventually, almost all members in the species will be incest resistant.
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