Admixture time estimates for the African-Americans, Polynesians and Fijians. Simulated data from 100 simulations with a 20% and 40% migration rate are presented. Each curve represents a single admixed population. Average WT centers calculated for 100 chromosomes drawn at random from each population at exponentially growing time points are plotted as a function of time. Measurements obtained for the ASW, PLY and FIJ populations are shown by blue horizontal lines. Red vertical lines indicate the time estimate, and shaded boxes define the confidence intervals. Time estimate for ASW and PLY are based on simulations with a 20% admixture rate, while the time estimate for FIJ is based on simulations with a 40% admixture rate.