Figure 2.

Moran process with type-dependent dispersal patterns. In each discrete time step, a random individual reproduces and the offspring proliferates to a neighbouring node. Type A offspring (mutant, blue) migrate along the edges of the blue graph G_A, whereas type B offspring (residents, red) migrate along the red edges of G_B. The key quantity is the fixation probability ρ(G^A, G^B) that a single initial mutant successfully invades the population of residents.