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Hardy-Weinberg Equilibrium

Interactive Population Genetics Model with Chi-Square Testing

Population Parameters

200
0.50

Evolutionary Forces

Hardy-Weinberg Principle

When five conditions are met (no mutation, selection, drift, migration, or non-random mating), genotype frequencies remain stable:

p² + 2pq + q² = 1

The χ² test measures deviation from expected frequencies. Critical value at α=0.05 with df=1 is 3.84.

Generation
0
p (A freq)
0.50
q (a freq)
0.50

AA (p²)

Obs: 0.25 Exp: 0.25

Aa (2pq)

Obs: 0.50 Exp: 0.50

aa (q²)

Obs: 0.25 Exp: 0.25

Chi-Square Test (α = 0.05, df = 1)

χ² = 0.00

Population is in Hardy-Weinberg Equilibrium