"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
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