Scientists discover blonde 'switch'

June 2, 2014 12:44 AM

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Scientists discover blonde 'switch'

London: Whether you are born blonde or brunette depends on a single letter of the genetic code, scientists have learned.

The DNA switch fine-tunes the activity of a gene known to be linked to hair colour. Changing just one of its chemical components - a single genetic code element - is enough to generate blonde hair.

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