Multiple Choice
Which of the following best defines gene flow in the context of allelic frequency changes?
21. Population Genetics
Allelic Frequency Changes
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In population genetics, when does gene flow occur?
A
When a population experiences a mutation rate high enough to immediately fix a new allele.
B
When individuals (or their gametes) migrate between populations and successfully reproduce, transferring alleles.
C
When mating occurs only among close relatives within a population (inbreeding).
D
When allele frequencies change due to random sampling error in a small population (genetic drift).
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