In order for migration to alter allele frequencies in another population:

Question

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In order for migration to alter allele frequencies in another population, the gene pool of the migrating population must be different from the population it is joining. This is because if the gene pools are similar, there will be no significant impact on allele frequencies. However, if the migrating population has unique alleles or a different distribution of alleles compared to the population it is joining, then these differences can impact the allele frequencies in the receiving population through interbreeding.

In Order for Migration to Alter Allele Frequencies in Another