Table 1. Proportions of ancestry among simulated cohorts.

We simulated 1,000 admixed individuals. From these we selected 100 individuals with a true proportion of European (CEU) ancestries within 10% of the proportions listed here for use in accuracy testing.

Ancestral panel	%YRI	%CEU	%PEL
AFA	80%	20%	0%
HIS	0%	70%	30%
3WAY	30%	60%	10%