Peter F  wrote:

> "John Wilkins"  wrote in message
> news:bgoouk$9k0$1{at}darwin.ediacara.org...
> 
> > That said, I do think that selection is one extreme of a scale of
> > sampling ratios - if there is an imbalance of smapling [A welcome example
> of drift :-)] ratios of one
> > allele at a locus over another, then you have selection. If the biases
> > maintain the demic ratios, then you have stablising [N.B. More drift in
> action! :-)] selection, and if
> > not directional selection. But at some point the selection coefficient
> > is so low that it is lost in the general random noise of sampling, and
> > it becomes indistinguishable from drift - because it *is* drift. So
> > either selection is biased drift, or drift is ineffectual selection.
> 
> It has always seemed to me that John Wilkins were capable of delivering
> valuable contributions. [Sincerely!]
> 
> P

Only the first is a transciption error. The second is the One True
Spelling (as determined by the normal distribution of fit alleles in
Australia). Anyway, a *single* transcription error is not drift. It has
to be spread either to equilibrium or fixation in the deme over
subsequent generations.
-- 
John Wilkins - wilkins.id.au
[I]magine a puddle waking up one morning and thinking, "...interesting
hole I find myself in - fits me rather neatly, doesn't it? ...
must have been made to have me in it." Douglas Adams, Salmon of Doubt
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