Gene flowGenetic drift✔ Both is a mechanism for evolution
Gene flow✔ Genetic driftBoth is often related to disasters
✔ Gene flowGenetic driftBoth is also called “migration”
✔ Gene flowGenetic driftBoth deals with movement between populations
Describe an environmental factor that could influence natural selection and decrease genetic diversity. Pick a specific example to illustrate your point.
A pesticide can decrease genetic diversity in an insect population. The pesticide kills susceptible insects, while resistant insects survive and reproduce. Natural selection therefore favors pesticide resistance, reducing the variety of traits in the population.
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