>DNA is comprised of four bases: A, C, T and G. People whose HMGA2 gene
>held a letter "C" instead of "T" on that location of the gene
>possessed larger brains and scored more highly on standardized IQ
>tests.

>"This is a really exciting discovery: that a single letter change
>leads to a bigger brain," said Thompson. "We found fairly unequivocal
>proof supporting a genetic link to brain function and intelligence.
>For the first time, we have watertight evidence of how these genes
>affect the brain. This supplies us with new leads on how to mediate
>their impact."

>>"New Genes Linked to Brain Size, Intelligence" (Science Daily)

>>DNA is comprised of four bases: A, C, T and G. People whose HMGA2
>>gene
>>held a letter "C" instead of "T" on that location of the gene
>>possessed larger brains and scored more highly on standardized IQ
>>tests.

>>"This is a really exciting discovery: that a single letter change
>>leads to a bigger brain," said Thompson. "We found fairly
>>unequivocal
>>proof supporting a genetic link to brain function and intelligence.
>>For the first time, we have watertight evidence of how these genes
>>affect the brain. This supplies us with new leads on how to mediate
>>their impact."

> So were these new genes created by genetic engineers, or did they
> come about
> naturally?

> If the latter, when did they first appear?