Genetic Drift 2D — Wright-Fisher Allele Frequency Simulator

🧬 Genetic Drift — 2D · Wright-Fisher allele-frequency trajectories

Controls

Population size N 50 Initial frequency p₀ 0.50 Populations to simulate 12 Generations 200

Generation0

Fixed (p=1)0%

Lost (p=0)0%

Segregating100%

Each generation, every population draws 2N allele copies by binomial sampling with replacement from its own previous generation (Wright-Fisher model). No selection: the expected frequency is unchanged, but sampling variance makes p drift randomly until it fixes (p=1) or is lost (p=0). Smaller N drifts faster.