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Lets say that a research team is looking at natural insect populations (e.g. beetle), and they find that allele frequencies at a locus in the genome have changed over the past few generations even though the locus is neutral. Why do the frequencies change at neutral loci?

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  • $\begingroup$ There are four mechanisms by which allele frequencies can change over generations: mutation, genetic drift, gene flow, and natural selection. Which of these could affect a neutral locus? $\endgroup$
    – Eonema
    Commented May 20 at 18:57

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