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echo: evolution
to: All
from: Peter F
date: 2003-08-12 23:04:00
subject: Re: Genetic Drift: bad th

"John Wilkins"  wrote in message
news:bh9ba9$26su$1{at}darwin.ediacara.org...
> 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.

:-)))

Although the mutant words of yours was not what I mainly picked up on from
your post, your concluding sentence was, I relished making a small meal out
of them; motivated as I was by my liking for mirth and by the opportunity to
forget that I myself often seem to be a language-fault generating freak of
nature. %-}

P
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