Fig 3. Comparison of the cycle and the well-mixed population.

Top: The cycle for small N is neither an amplifier nor a suppressor of selection. It decreases the fixation probability compared to the well-mixed population for both advantageous and disadvantageous mutants. Bottom: The difference between the fixation probability in the well-mixed population and the cycle increases with N for advantageous mutants. For disadvantageous mutants, all fixation probabilities tend to zero as the graph size increases.