Figure 2. Example histograms of IBD segments to illustrate the differences between groups with founder events of different magnitudes.

These histograms provide visual illustrations of differences between groups with different IBD scores. As a ratio relative to Finns (FIN; black), these groups (red) have IBD scores of: (A) ~26 in Ulladan, (B) ~3 in Birhor, (C) ~0.9 in Ashkenazi Jews, and (D) ~0.1 in Mahadeo_Koli. In each plot, we also show European Americans (CEU) with a negligible founder event in blue. Quantification of these founder events is shown in Figure 3 and Supplementary Table 5. The IBD histograms were normalized for sample size by dividing their frequency by $\{(\begin{array}{c}2n\hfill \\ 2\hfill \end{array})-n\}$, where n is the number of individuals in the sample. All data for the figure are based on the Human Origins dataset.