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Scientists have found the first genetic instructions hardwired into human DNA that are linked to being left-handed.

The instructions also seem to be heavily involved in the structure and function of the brain – particularly the parts involved in language.

The team at the University of Oxford say left-handed people may have better verbal skills as a result.

But many mysteries remain regarding the connection between brain development and the dominant hand.

What does this tell us?

About one in 10 people is left handed.

Studies on twins have already revealed genetics – the DNA inherited from parents – has some role to play.

However, the specifics are only now being revealed.

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Image caption

President Barack Obama signing a bill, with his left hand.

The research team turned to the UK Biobank – a study of about 400,000 people who had the full sequence of their genetic code, their DNA, recorded.

Just over 38,000 were left-handed.

And the sci

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