The genetics and evolution of handedness.

  title={The genetics and evolution of handedness.},
  author={Michael C. Corballis},
  journal={Psychological review},
  volume={104 4},
At some point in hominid evolution, a mutation may have produced a "dextral" (D) allele, strongly biasing handedness in favor of the right hand and control of speech toward the left cerebral hemisphere. An alternative (chance [C]) allele is presumed directionally neutral, although there are probably other genes that influence asymmetries and that may create a weak bias toward right-handedness (and other asymmetries). Simulations show that the D allele could have spread quite quickly through a… CONTINUE READING