Brain Development Gene is Evolving the Fastest
Posted on August 16, 2006 Comments (2)
Fastest-evolving human gene linked to brain boost by Gaia Vince
A study of differences between the human and chimp genomes has identified a gene associated with neural growth in the cerebral cortex – the part of the brain involved in processing thoughts and learning – as having undergone “accelerated evolutionary change”.
Katherine Pollard and colleagues at the University of California Santa Cruz, US, suggest that the fast-changing gene may help explain the dramatic expansion of this part of the brain during the evolution of humans.
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There are only two changes in the 118 letters of DNA code that make up HAR1 between the genomes of chimps and chickens. But chimps and humans are 18 letter-changes apart. And those mutations occurred in just five million years, as we evolved from our shared ancestor.
2 Responses to “Brain Development Gene is Evolving the Fastest”
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March 16th, 2008 @ 7:38 pm
“In a complex animal like a mammal or a bird, virtually every action depends on a coming together of systems for perception, attention, motivation, and so forth…”
August 13th, 2008 @ 8:39 am
A nice example of scientific discovery in action. The direct link from cooking to brain development is far from proven but it is interesting…