Washington: The genetic changes that account for the bulk of
differences between humans and primates boils down to a single
factor — gene duplication, which gave us an all powerful brain.
A study by scientists of the Scripps Institute has shown
that an extra copy of a brain-development gene, SRGAP2, first
appearing in our ancestral genomes 2.4 million years ago,
allowed maturing neurons (brain/ nerve cells) more time to wire
themselves into a bigger brain.
“This appears to be a major example of a genomic innovation
that contributed to human evolution,” said senior study author
Franck Polleux, professor at the Scripps Research Institute, the
journal Cell reports.