Figure 3.

Ancestral state reconstruction of sex determination systems in insects. Pie charts on nodes of the tree show the probability of the ancestral state at that node calculated from 1000 stochastic mappings. Pie charts at the tips indicate the abundance of different types of sex determination mechanisms in our dataset. The displayed values are from a model where transitions out of haplodiploidy are set to zero and the probabilities for the root state are equal to the stationary distribution.