Figure 1.

Representative state space for a two-population Island Model. Shown here is an example of a two-population island model with sample sizes $n_1=1$ and $n_2=1.$ The model has two population sizes, $N_1$ and $N_2,$ and two migration rates, $m_1$ and $m_2.$ The representative state space at each phase in the coalescent tree is shown to the right.