Fig 1. Variance in ancestry.

Plots depict summaries of genetic ancestry from 10 replicate simulations (gray lines). Each simulation followed a Wright-Fisher model starting with an admixed population composed entirely of F1s. The population then evolved by recombination and genetic drift. Population size was constant (2N = 200), and simulations ran for t = 1000 generation (time is reported relative to populations size as t/2N). Ancestry was followed at 100 genetic loci that were equally spaced on a 1 Morgan chromosome. Plots show the variance in genome-average ancestry among individuals (top pane), the variance in local ancestry frequencies among loci, and the proportion of loci where individuals are expected to have one gene copy from each source population (i.e., inter-population ancestry [6]). Note that variation in ancestry frequencies persists long-after variation in genome-average ancestry has decayed.