Example de Finetti diagram. Example of a de Finetti representation of the trajectory of the process with 5 genes, with parameters set at γ1 = 10−3, κ = 0.5, c = 0.0008and ε = 0.003. These parameters reflect a high rate of transfer, and low exposure to the selective environment. The central figure shows the change in population from each end, with the equilibrium state shown by a circle on the left hand side. Histogram A shows the population distribution at equilibrium, while Histograms B and C show states along the decay trajectory from the complete pathway.