Cover: Graphical representation of genotypes across TRPV6 shows a dramatic signature of positive selection in non-African populations. Rows correspond to individuals and columns denote SNPs. For each SNP, blue, yellow, and red boxes indicate whether the individual is homozygous for the ancestral allele, heterozygous, or homozygous for the derived allele, respectively. Grey boxes indicate missing data. See Akey et al., pp. 2106-2113, this issue, for further information.
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