Question 1

What is a Selection Coefficient?

Accepted Answer

The selection coefficient (s) quantifies the fitness disadvantage of a genotype. If the fittest genotype has relative fitness 1, a genotype with fitness (1−s) has selection coefficient s.

Question 2

How does the Selection Coefficient work?

Accepted Answer

s = 1 − w_aa/w_AA Then: Allele frequency change: Δq ≈ −sq²p/(1−sq²).

Question 3

Can you give an example of how to use the Selection Coefficient?

Accepted Answer

Example: Input w_AA=1.0 · w_aa=0.7 gives a result of s = 0.3 (30% fitness reduction) (Moderate selection against recessive).

Question 4

Is the Selection Coefficient free to use?

Accepted Answer

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

Question 5

How accurate is the Selection Coefficient?

Accepted Answer

Our Selection Coefficient uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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