Is there a left hand gene?

Answer by  traumatised (3285)

Yes, according to Oxford University's Wellcome Trust Centre for Human Genetics in 2007. The LRRTM1 gene has been shown to increase the odds of a person being left-handed and also controls, to an extent, which part of a person's brain regulates functions such as speech and emotion.

Answer by  John (9008)

Handedness is an inborn trait. As such, it is genetic. However, it is not currently certain whether it is the result of a single gene or the interaction of several genes. It should be noted that right handedness--or ambidexterity, for that matter--is also genetic.