Amazingly, that statistic is not a

Amazingly, that statistic is not a one-off, nor country dependent. It appears to hold true for the world over that roughly 10% of the population is always left-handed. This should therefore imply that there is a genetic basis for the behavior. But is there? In a talk given to the Royal Society, Silvia Paracchini, a geneticist from the University of St. Andrews, thinks that things are not as black and white as they may seem.