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A hundred years ago we thought the DNA molecule irrelevant, today it's both a history machine and a beacon to our future enabling us to prevent disease and much more. So why must we be cautious? 

What can online genetic tests do, apart from catching killers? We give them a try…

Professor Turi King is Professor of Public Engagement and Genetics at the University of Leicester. She is best known for establishing the bones found in a Leicester car park in 2013 as King Richard the Third and more recently for her genetic investigations on the BBC series ‘DNA Family Secrets’. 

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