Hardy-Weinberg Equilibrium

AP Biology· difficulty 2/5

Allele A frequency in a large randomly mating population is tracked across generations.

Generation freq(A) 0 0.50 10 0.51 20 0.49 30 0.50

What does the table suggest about this population?

  • A

    It is approximately at Hardy-Weinberg equilibrium

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  • B

    It is being driven to fixation by drift

  • C

    It is experiencing a population bottleneck

  • D

    It is undergoing strong directional selection

Explanation

Allele frequencies fluctuate only slightly around 0.50 across generations, consistent with HW equilibrium. There is no directional trend or strong drift.

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