LD (r2) in the HapMap YRI sample, for the r2 ≥ 0.8 bin for rs16969968 defined by HapMap CEU LD. Of the 21 bin members pictured in Figure 1, 20 were genotyped in HapMap YRI of which 4 were monomorphic. The numerals in the cells denote the r2 between the two SNPs corresponding to the cell. Cells with no numeral indicate r2 = 1. Cell shading indicates strength of r2 as shown by the numeral.