Multiple rare variants as a cause of a common phenotype: several different lactase persistence associated alleles in a single ethnic group.

Abstract excerpt

Persistence of intestinal lactase into adulthood allows humans to use milk from other mammals as a source of food and water. This genetic trait has arisen by convergent evolution and the derived alleles of at least three different single nucleotide polymorphisms (-13910C>T, -13915T>G, -14010G>C) are associated with lactase persistence in different populations. Each allele occurs on an extended haplotype,...

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