A hierarchical cluster for the Perlegen data with a sample of 200 SNPs. A total of 71 unrelated individuals from three populations are shown: AA (23), EA (24) and HC (24). This figure shows a clustering result using 200 genome-wide random autosomal SNP loci. It is evident that AA, EA and HC form three distinct clusters except for the misclassification of AA19. Branch height represents dissimilarity.