Asked by Sam
A student is assigned to create a poster that explains a specific evolutionary mechanism. Which of the following examples best describes gene flow?
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GPT-5 mini
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Gene flow is the movement of alleles between populations when individuals or their gametes migrate and reproduce in a different population.
Best example: A few birds from one island fly to a neighboring island and mate with the resident birds, introducing new alleles into the resident population.
Why this fits: it involves migration and interbreeding that change allele frequencies between populations. (By contrast, examples involving random loss of alleles after a bottleneck describe genetic drift, changes in allele frequency due to different survival/reproduction describe natural selection, and new alleles appearing spontaneously describe mutation.)
Best example: A few birds from one island fly to a neighboring island and mate with the resident birds, introducing new alleles into the resident population.
Why this fits: it involves migration and interbreeding that change allele frequencies between populations. (By contrast, examples involving random loss of alleles after a bottleneck describe genetic drift, changes in allele frequency due to different survival/reproduction describe natural selection, and new alleles appearing spontaneously describe mutation.)
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