[ExI] [GRG] NewAbs: The Phenotype of IQ is Polygenic x 1, 000 Genes
thespike at satx.rr.com
Wed Aug 10 19:05:44 UTC 2011
On 8/10/2011 11:02 AM, Richard Harper wrote:
> When people first learn about fitness-indicator theory there is a
> tendency to think of it in terms of the peacock's tail, but it is much
> more than that in many ways, and is still a fairly hot area of research.
> As a basic principle of fitness indicators, there can be a tendency for
> them to be under selection pressure to express more and more information
> over time,
Here is a notion that probably has cropped up (or been crushed
resoundingly) in the literature: despite the principle that evolution is
blind to phenotypes once they're past reproductive capacity (due
allowance made for keeping grannies alive to tend to babies, teach them
to speak, etc), I wonder if some apparent instances of "deterioration"
might actually be adaptations promoting the survival of one's lineage.
It occurs to me that in a highly intelligent and memetic species like
ours, memory management in the old (you can't remember what you ate this
morning, but vividly recall the nutritious summer of 1887 or the brutal
cold snap of 1922) might not be [entirely] an entropic accident.
The current vital generations can be depended on to store recent events
and trends, and maintain the liturgical coding of what's happened to the
tribe and environment for many hundreds or even thousands of years--but
perhaps sharp memories that retain hazard and opportunity information
from 50-60-70 years ago, if treated respectfully by the young, were
beneficial in our preliterate EEA. If the maintenance cost of retaining
full memory in old age is too great, perhaps early memories are given
special care by the brain?
[Just-So Panglossian stories since 1963!]
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