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Population Genetics

Sequence of Expressions

Allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences.
The loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population.
Principle

Genetic Drift

Variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.