Genetic diversity measured by heterozygosity (HET) in Mexican and HapMap populations. Northern, central, central-Gulf, central-Pacific, and southern regions in Mexico were included. Average HET values are shown for Amerindian Zapotecos (ZAP), 6 Mexican Mestizo subpopulations (GUA, GUE, SON, VER, YUC, and ZAC), and HapMap populations (YRI, CEU, and JPT + CHB).