tl;dr: Human Accelerated Region 1 (HAR1) is a segment of the human genome found on chromosome 20 that is a human accelerated region, with the RNA gene HAR1A expressed in the developing human brain and the overlapping gene HAR1B having lower expression.
tl;dr: Human Accelerated Region 1 (HAR1) is a segment of the human genome found on chromosome 20 that is a human accelerated region, with the RNA gene HAR1A expressed in the developing human brain and the overlapping gene HAR1B having lower expression.