The Human
Genome Project poses a threat, all right, but not the way Darwinists
have it figured.
Imagine that you are
a Nobel-winning scientist. The government and Celera Genomics Corp. are
about to announce that the human genome--the sum total of our DNA--has
been transcribed, and you're writing an article for The New York Times
on the significance of this breakthrough.
What would you say?
When Nobel laureate
David Baltimore was given that chance, one thing he said was that the
breakthrough "confirms something obvious and expected, yet
controversial: Our genes look much like those of fruit flies, worms and
even plants. Should there be any doubt … the genome shows that we all
descended from the same humble beginnings and that the connections are
written in our genes. That should be, but won't be, the end of
creationism."
Baltimore's remarks,
echoed by other commentators and scientists, show why evolution
continues to be controversial: the rhetoric doesn't square with reality.
Far from refuting creationism, genome research has raised vexing
problems for contemporary evolutionary theory.
The key claim that's
been repeated since the genome breakthrough is that similarities between
humans and other organisms confirm their common ancestry. That claim,
however, has problems before it even enters the lab.
Phillip Johnson, a
professor of law at the University of California, Berkeley, and a noted
critic of Darwinism, points out that the most fundamental problem is a
logical one.
"Darwinists
consistently confuse the existence of a pattern with the process that
produced it--namely, common descent guided by natural selection," said
Johnson. "Whenever they see anything that seems to confirm the existence
of the pattern, they think that it confirms their specific theory about
how the pattern came about. Of course, it doesn't."
The only way genetic
similarities prove anything is if other options, including an
intelligent designer, have been ruled out--in which case the decisive
element is not similarity, but other evidence.
"Whether common
physical descent is the explanation for the similarities has to be
decided by experimental evidence, and that's always been a problem,"
Johnson said. "The fossil record isn't consistent with Darwinism, and
the claim that natural selection can create all the kinds of things we
see in biology is completely unsupported."
Indeed, genetic
research has added to this problem, since some of the similarities it
found were in the wrong places.
According to
embryologist Jonathan Wells, author of the forthcoming book Icons of
Evolution, one such place is in the genes that control embryonic
development.
In Darwinian theory,
Wells said, every organism is supposedly produced by a genetic program
in the embryo. As this program is passed from one generation to the
next, it changes due to genetic mutations and the effects of natural
selection--the faster gazelle outraces the cheetah, for example, and
lives to procreate, passing along its genes. These changes in turn alter
the descendant's physical features. The more the genes change, the more
the organism changes.
As a result, Wells
said, "different kinds of organisms should have different genetic
programs--and for years, this is what neo-Darwinists predicted."
But that's not what
genetic researchers found. To the contrary, "the genes that have major
effects in early development turn out to be strikingly similar across a
wide range of phyla."
To appreciate what
this means, a phylum (pl. phyla) is an extremely broad
biological category. The phylum that contains humans also contains
lizards, birds, fish and snakes. The differences between phyla are even
wilder. As much as humans and birds differ from each other, they differ
even more radically from slugs, crabs and sponges.
This is the range
across which these genes work. Scientists have found, for example, that
the gene controlling the development of limbs in fruit flies is very
similar to the genes controlling the development of limbs in mice,
tube-feet in sea urchins and spines in spiny worms.
In fact, the genes
are so similar, Wells said, "that developmental genes from mice--and
even humans--can replace their counterparts in flies."
What's more, such
crossovers are legion. Indeed, many organisms seem to share not just one
gene, but an entire suite of genes. And researchers say this seems to be
the rule rather than the exception.
If you believe that
living organisms were designed by a creative intelligence, these
findings make sense. Just as humans use dipswitches in a variety of
electronic devices, a designer could use genetic switches in a variety
of organisms.
For Darwinists,
however, these findings spell trouble.
"According to
Darwinism, the reason these genes are so widespread is that they came
from a common ancestor," Wells said. "But the evidence indicates that
the common ancestor lacked the features that these genes now control.
That's a serious problem."
In the Darwinist
view, complex genes arise through the slow accumulation of advantageous
mutations. But what's the advantage of evolving a gene if the feature it
controls doesn't exist?
One could reply that
the gene controlled some unknown feature in the ancestral organism. But
that's little more than wishful thinking--and a tacit admission that
these findings are not an asset to Darwinism, but a problem to be
explained away.
In the years ahead,
such problems will only multiply. That should be, but probably won't be,
the end of Darwinism.
Mark Hartwig,
Ph.D., is editor of
Teachers in Focus
magazine.
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Focus on the Family. All rights reserved. International copyright
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File Date: 8.11.00