Chimp Brain Syndrome...

[tk2kewl]

Finally! A diagnosis of the President's brain disorder!

Is brain still developing?

Discovery of two gene variations have some scientists saying that human think tank will continue to evolve

BY JAMIE TALAN
STAFF WRITER
September 9, 2005

Scientists have discovered a gene variation, perhaps involved in brain size, that showed up only 6,000 years ago - a mere blink of the eye in evolutionary time.

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Analyzing DNA samples from individuals throughout the world, they identified two genetic varieties that are unique to humans. One called abnormal spindle-like microcephaly, or ASPM, first appeared 6,000 years and is now found in 30 percent of the population. The other, called microcephalin, evolved about 37,000 years ago and has spread to more than 70 percent of the population.

<snip>

People with damage to either of these two genes - microencephalin and ASPM - have smaller brains, equal in size to chimp brains. They also suffer from impaired cognitive abilities and have severe language problems.

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[tk2kewl]

1. .

[electropop]

2. Wait a minute.

This would imply that at least 70% of the population have chimp-sized brains? This makes no sense. Also, if it's in 70% of us, it must be adaptively positive, or it would have been bred down to a much lower level. Again, the 70% number makes no sense.

[tk2kewl]

3. 70% have the gene not the mutation