Principal component analysis of sub-Saharan African, European and East Asian populations. The analysis was performed using only the individual continental groups. The populations included each of the sub-Saharan African (A), European (B), and East Asian (C) ethnic groups. The color code highlights specific ethnic groups.
Nassir et al. BMC Genetics 2009 10:39 doi:10.1186/1471-2156-10-39