Figure 4.

Distribution of YRI High-Frequency Derived Alleles in the Centromeric Cluster

The black lines depict the distribution of HapMap SNPs with (1) F_ST values in the 99^th percentile on the X chromosome and (2) ancestral states that were unambiguously assigned. The red lines depict the subset of those SNPs with derived alleles at high frequencies in the YRI samples. The difference between the black and red curves thus represents all highly differentiated SNPs with ancestral alleles at high frequencies in the YRI.