Adam Marczyk wrote:
There are several mined quotes in Michael Behe's book that the QMP
does not
currently cover, and that I have seen elsewhere in creationist
literature.
Below, I hereby offer a debunking of one of them.
=
Quote as given by Michael Behe in Darwin's Black Box, 1996 hardcover
edition, p.29:
"We conclude - unexpectedly - that there is little evidence for the
neo-Darwinian view: its theoretical foundations and the experimental
evidence supporting it are weak."
The reference is:
Orr, H.A. and Coyne, J.A. "The Genetics of Adaptation: A Reassessment,"
American Naturalist vol.140, p.726 (1992).
I looked that paper up, and as it turns out - and I'm sure this will
be to
no one's surprise - this quote was taken out of context in a highly
misleading way.
Behe uses this quote in a section along with numerous other quotes,
several
of which I also intend to pursue, in order to support his point that
"From
Mivart to Margulis,
Grene on Schindewolf; Margulis; Calder; Gould on hogwash in evolutionary
theory
http://groups.google.co.in/groups?selm=Pine.SGI.3.95.970721233453.16211D-100000%40umbc9.umbc.edu
Margulis; Gould on paedomorphosis
http://groups.google.co.in/groups?selm=Pine.SGI.3.95.970805010133.12918J-100000%40umbc10.umbc.edu
there have always been well-informed, respected
scientists who have found Darwinism to be inadequate" (p.30).
However, Coyne
and Orr are not in any way supporting Behe's view or disagreeing with
evolution in general, as Behe strongly implies they are.
Such a lovely word, [AM]"implies." Especially in connection with the
vague [AM]"evolution." Say, what do you think Behe meant by
[Behe]"Darwinism"?
The topic of this
paper is the role of different types of mutation in giving rise to
evolutionary adaptation. The first sentence of the paper is as follows:
"It is a tenet of evolutionary biology that adaptations nearly always
result
from the substitution of many genes of small effect" (Orr and Coyne, p.
725).
Now here is Behe's quote in context, from the next page (and note that he
placed a period where no period originally was):
"We conclude - unexpectedly - that there is little evidence for the
neo-Darwinian view: its theoretical foundations and the experimental
evidence supporting it are weak, and there is no doubt that mutations of
large effect are sometimes important in adaptation.
We hasten to add, however, that we are not 'macromutationists' who
believe that adaptations are nearly always based on major genes. The
neo-Darwinian view could well be correct. It is almost certainly true,
however, that some adaptations involve many genes of small effect and
others
involve major genes. The question we address is, *How often* does
adaptation
involve a major gene? We hope to encourage evolutionists to reexamine
this
neglected question and to provide the evidence to settle it" (p. 726).
and more:
"The micromutational view of Darwin, Fisher and others is clear:
adaptations
arise by allelic substitutions of slight effect at many loci, and no
single
substitution constitutes a major portion of an adaptation. There are, in
contrast, at least two forms of macromutationism [reference omitted]. The
first is exemplified by the extreme saltationism of Goldschmidt
[reference
omitted]: single 'systemic mutations' produce important, complex
adaptations
in essentially perfect form (Goldschmidt believed that systemic mutations
were chromosomal rearrangements). As Charlesworth [reference omitted]
notes,
this 'strong' version of macromutationism is almost certainly wrong.
It is
highly unlikely that a single mutation could create adaptations as
complex
as eyes or legs, much less new taxa differing by many adaptations.
The second form of macromutationism posits that adaptation often
involves one or a few alleles of large effect. Although these alleles
do not
produce perfect adaptations by themselves, they are responsible for a
large
portion of the adaptation. This 'weak' version, which is more
realistic than
Goldschmidt's view, is the form of macromutationism we consider in
the rest
of this article. Although the term 'macromutationism' has unfortunate
historical connotations, we use it for lack of a better word" (p.726).
In other words, the sole thrust of Orr and Coyne's paper was to argue in
favor of a different model of *mutation* - one where a mutation affects a
"master control" gene and thus influences the activity of many other
genes
which that gene regulates. They set this in opposition to the
"classic" view
that evolution would have to proceed by altering the effect of each
of those
downstream genes individually. (As it turns out, Orr and Coyne were
right on
the money with this one: scientifically literate readers will by now
doubtless be familiar with the homeobox genes whose discovery has
provided a
tremendous jumpstart to the field of evolutionary developmental
biology and
given us new insight into the origin of complex adaptations.)
Please share some of this [AM]"insight," if you would.
This is in no way a disagreement about the fact that evolution has
happened.
Instead, like so many creationist-mined quotes, it is a legitimate
scientific debate about the *mechanisms* by which that process takes
place.
Behe has ripped it out of context and used it deceptively to convey to
readers the false impression that Orr and Coyne have doubts about the
actual
fact of evolution's occurrence, when in reality nothing could be further
from the truth.
And what do you think of what I did?:
1992 Orr & Coyne on Fisher
http://groups.google.co.in/groups?selm=Pine.SGI.3.95.970329001049.19794A-100000%40umbc10.umbc.edu
1992 _American Naturalist_ paper by Orr & Coyne
http://groups.google.co.in/groups?selm=Pine.SGI.3.96.980614220859.6338A-100000%40umbc8.umbc.edu
In [AM]"fact of evolution's occurrence," meaning of [AM]"evolution"?
.