The blueprint for every living organism is encoded in its DNA. Barely a week goes by without scientists announcing they have discovered genetic variants that help explain our differing traits and susceptibility to disease. But what does DNA actually look like?

It turns out that all you need to find out is some saliva, washing-up liquid, pineapple juice, vodka and a cocktail shaker.

In this clip from BBC programme Dara O’Briain’s Science Club, Prof Mark Miodownik from University College London demonstrates how to extract DNA molecules from the nucleus of cheek cells and make them visible using everyday kitchen ingredients.

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