Researchers have identified a genomic variant strongly associated with sensitivity to the sun, brown hair, blue eyes — and freckles. In the study of Icelanders the researchers uncovered an intricate pathway involving the interspersed DNA sequence, or non-coding region, of a gene that is among a few dozen that are associated with human pigmentation traits. The study by an international team including researchers from the National Institutes of Health was reported in the journal Cell [1].
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