New Studies Find Many Genes Influence Left- or Right-Handedness

Scientists have long-posited that one single gene may determine whether a person is left- or right-handed (the latter, of course, being dominant, with 90% of people favoring their right). This theory does take into account the fact that environment factors (including geography and culture) likely play a critical role, too. Now, however, several studies involving millions of participants reveal that dozens of genetic variations may …