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Genetic Drift Calculator

Genetic drift magnitude in populations

🧬Genetic Drift Calculator

Genetic drift is random change in allele frequencies due to chance — particularly influential in small populations where sampling error is large relative to gene pool size.

  1. 1Variance per generation: p(1-p)/(2N)
  2. 2Small N → large fluctuations → faster drift to fixation or loss
p=0.5 · N=50=σ per generation = ±5%Small population drifts fast

Fun Fact

The founder effect and bottleneck effect are extreme genetic drift events. The Amish show high frequencies of rare genetic conditions from a small founding population.

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