Fitness Calculation from Selection Coefficient

Correct Answer: 0.9

From the notes: Fitness (F) = 1 − S

Calculation

S = 0.1 → Fitness = 1 − 0.1 = 0.9

Understanding the Formula

• S = 0 → Fitness = 1.0 (no selection; maximum fitness)
• S = 0.1 → Fitness = 0.9 (mild selection against this genotype)
• S = 0.5 → Fitness = 0.5 (strong selection)
• S = 1.0 → Fitness = 0.0 (lethal; genotype is completely eliminated)

Key Definitions (from notes)

• Fitness = Adaptive Value = Selective Value
• S = coefficient of selection; measures the relative disadvantage of a genotype
• Fitness measures the contribution of offspring to the next generation