22. Evolution of Populations
Genetic Drift
Multiple Choice
Multiple ChoiceHumans first evolved in sub-Saharan Africa. Populations of modern humans likely migrated from Africa, populating the rest of the world within the last 100,000 years. A general trend observed in the human population is that the farther a native population is from Africa, the less genetic diversity in that population. What could explain this trend?
A
Exchange of alleles through gene flow.
B
Loss of alleles through a population bottleneck.
C
Balancing selection and heterozygote advantage.
D
Loss of genetic diversity through repeated founder effects.
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