Genetic Variation Video Lessons

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Problem: Crickets living high on a mountain have a high frequency of alleles for cold tolerance. Storms frequently blow crickets off the mountain down to lower elevations where they mate with crickets lacking the cold tolerant alleles, thus increasing the allele frequency in the low elevation population. This is an example ofa. genetic driftb. gene flowc. mutationd. sexual selection

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Problem Details

Crickets living high on a mountain have a high frequency of alleles for cold tolerance. Storms frequently blow crickets off the mountain down to lower elevations where they mate with crickets lacking the cold tolerant alleles, thus increasing the allele frequency in the low elevation population. This is an example of

a. genetic drift

b. gene flow

c. mutation

d. sexual selection

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