BF of shared recombination hotspots between (A) BEN and Chimp and between (B) CEU and Chimp as a function of location for the HLA region. The coordinates are based on the coordinates in the original data set (Winckler et al. 2005), which used the hg15 reference genome. Six human recombination hotspots within the region, including DNA1, DNA2, DNA3, DMB1, DMB2, and TAP2, estimated from sperm-typing studies (Jeffreys et al. 2001), are illustrated with the horizontal bars.