Generation: 0
Allele freq (p): 0.50
Mean fitness: 1.00
Δp = sp(1−p)[ph + (1−p)(1−h)] / w̄
With s = selection coefficient, h = dominance (0=recessive, 0.5=additive, 1=dominant).
Mean fitness w̄ = p²·1 + 2p(1−p)·(1−hs) + (1−p)²·(1−s).
Strong selection drives rapid fixation; weak selection lets drift dominate.