Biology / Unit 8 Bio 1767 short lesson, about 20 seconds
Nonrandom Mating
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The idea
Nonrandom mating changes genotype frequencies when individuals do not pair at random, whether from mate preference or unequal access to partners.
In practice
Assortative mating, where individuals preferentially mate with phenotypically similar partners, is one common form of nonrandom mating.
Where people slip
Nonrandom mating changes genotype frequencies specifically — it does not, by itself, change underlying allele frequencies in the gene pool.
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