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A person's skin pigment, which determines hair color and skin tone, is influenced by the melanocortin-1 (MC1R) gene receptor. For the population's one to two percent of redheads, a mutation in MC1R accounts for their red hair color and typical light skin. Now researchers have discovered that the same MC1R mutation responsible for the red hair phenotype also promotes an important cancer-causing pathway. [Source: Beth Israel Deaconess Medical Center]
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