Figures & data
Figure 1. Models of population diversification through adaptive evolutionary sweeps under fixed selective pressure. (A) Simplistic model of purifying selection whereby an adaptive mutation (red cell) confers a fitness advantage over the progenitor (yellow), leading to fixation of the mutation in the population. (B) More realistic model with stable co-existence of multiple lineages (yellow, red, green and blue), where some adaptive traits (green non-motile cells) require refinement before sweeping through the population. Further complexity in population dynamics are imparted by spatial organisation and fluctuations in selective pressure.
