Mutation–Selection Balance
Allele frequency dynamics under selection & mutation pressure
Parameters
Selection coeff. s
0.05
Dominance h
0.5
Mutation rate μ (×10⁻⁴)
1.0
Back-mut rate ν (×10⁻⁴)
0.1
Initial frequency p₀
0.5
Restart
+ Trajectory
Current p:
—
Equilib. p̂:
—
Mean fitness w̄:
—
Generations:
—
Δp = [p(1−p)(p·h·s + (1−p)·(1−h)·s)] / w̄
− μp + ν(1−p)
Equilibrium p̂ ≈ μ/hs (additive)