Posted by
Marcus G. Daniels on
URL: http://friam.383.s1.nabble.com/Relaxed-Selection-a-b-level-posting-tp1315075p1318004.html
Phil Henshaw wrote:
> We could consider the vast variation in
> canine breeds and the fact that breeding selection as an extreme form of
> epigenetics has not apparently altered the species they all belong to.
>
Selection from breeding would mostly be constrained genetics, i.e. a big
and a small dog could be discriminated by, say, an insulin allele, say
(
http://www.sciencemag.org/cgi/content/abstract/316/5821/112).
However in epigenetic case we are talking about an inherited but
non-genetic change.
> Perhaps the question is how environmental pressures and experience may
> clearly influence genetics, but be insufficient to originate the kind of
> somehow deeper genetic change that creates new forms of life. Among other
> things it points to a distinct difference between 'shallower' and 'deeper'
> genetic change indicating that some form of structure other than noisy
> aggregations may be present.
>
Seems to me that everything from epigenetic gene regulation changes to
horizontal gene transfer is happening at the bacterial level.. What is
the question?
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