Elucidating the molecular mechanisms responsible for changes in gene expression is important for understanding the evolution of morphological traits. A new study identifies the molecular basis of the association between KITLG and blond hair color, presenting an intriguing example of how a single DNA base-pair change in an upstream regulatory element can cause relatively large and specific downstream changes in phenotype.
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Hoekstra, H. The secret of a natural blond. Nat Genet 46, 660–661 (2014). https://doi.org/10.1038/ng.3019
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DOI: https://doi.org/10.1038/ng.3019
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