| 4 -- THE ORIGIN OF VARIATION | ||
| As we saw at the outset, evolution requires a constant supply of variations for natural selection to work on – but where do variations come from? Darwin assumed that they just happened, and that was good enough – and also that those variations could go on accumulating and extending ad infinitum, given a good slice of “deep time”. Hugo
de Vries The first kind were “Ordinary” variations, such as the tiny differences found in a litter of kittens or the offspring of any organism. According to de Vries, Natural Selection working on these “ordinary” variations could never, under any circumstances, even in millions of years, “lead to a transgression of species”, as he put it. The second kind were “Mutations” which were caused, he suggested, by spontaneous and mysterious alterations in the genes, and which yielded significant modifications of the organism. These, he speculated, might eventually lead to new species. . [Ed: So Hugo was making the same assumption as Darwin and Lamarck, right? i.e. limit-less variation.] According to de Vries, mutations, which result in wholesale, coordinated modifications of in the DNA of organisms rather than miniscule variations, never arise gradually, little by little, by the accumulation of small changes, but come about suddenly without any visible preparation or transition – a fact consistently confirmed in the fossil record, and still a source of dissension among evolutionists today as they ponder the problem of “punctuated equilibrium”. [Ed: I think it was Hugo who said: “Natural selection may explain the survival of the fittest, but it cannot explain the arrival of the fittest”? I’ll check it out in his book: “Species and Varieties: Their Origin by Mutation”.] Although
Darwin was aware of “mutations” as exploited by plant breeders
of the day, he had no credible explanation for them, and therefore preferred
to focus on “ordinary” variations. Dr. Dawkins and his devotees,
however, even in the light of modern discovery, still expect us to believe
that even these meaningful “mutations” in the incredible
complexity of the cell mechanism are conveniently created by the fortuitous
and coordinated accumulation of random DNA copying errors. . [Ed: Doesn’t
that imply, G-Man, that every plant and animal we admire got here by
accident, by mistake, and should not really exist? If so, then why is
a human being any more important than a cabbage, except they can do
more useful things than a cabbage can? ] According to current theory, the remainder of this “ordinary” variation is due to the action of “polygenes”. In contrast to traits such as eye colour which may be under the control of a single “major” gene, quantitative variations, such as height or the size of a particular bone, are thought to be controlled by the cumulative action of several genes. [Ed: Careful, G-Man. That’s the theory as of lunchtime today, but they might change their minds tomorrow.] If this were not the case, then, after allowing for environmental variation, all members of a population would have identical dimensions. Such is the complexity of the chromosome structure, which is still poorly understood, the several polygenes for a given trait may be located far apart, with “junk” genes interspersed between. The polygene team players may even be located on different chromosomes—and may even help influence other traits as well. [Ed: You cannot be serious, G-Man!] Whilst
some polygenes tend to maximise (+) a trait, others will tend to minimize
it (-) Natural interbreeding will shuffle the distribution of the polygenes in a given population of organism, resulting in a typical average size with a range of sizes above and below. By selective breeding of taller members of a population, however, a tall breed could be created, which would have only the (+) polygenes in their sex cells for a particular trait, their “genotype”. At that point, however, unless a mutation occurs, no further increase will be possible. Hairy
Stuff! As expected,
by carefully interbreeding those with average bristle counts, and selecting
out those offspring with a higher count, scientists found that they
could quickly create a population with the maximum possible number of
55, but no more – an interesting illustration of “micro-evolution”,
better described as simple variation. Without some kind of new mutation
occurring, that was the limit of the variation for that particular trait. Allelomorphs
and Polymorphism Since in many organisms, such as insects and flowers, some 30 to 50% of the loci on the chromosomes may be polymorphic, the potential variety of combinations is vast – so that in a field of sunflowers, for example, which are visibly and evidently the same variety, no two individual plants might be identical in every detail – such as height, stem thickness, surface texture, petal width, shade of colour, etc., etc., etc. As a result,
a plant breeder let loose on our field of sunflowers could soon start
“out-breeding” features he didn’t want, and “inbreeding”
to select those he did want – probably being rewarded along the
way by a few interesting mutations generated by the creative action
of the “self-developing genome” that has apparently been
engineered into every organism. Mutation
or Mutation? The idea
was that “Micro-evolution” described the mutational variation
within a species or “kind” of organism, such as those observed
and exploited by plant and animal breeders – and that “Macro-evolution”
described the massive variation that evolutionists assume must have
happened in order for fish, for example, to have developed legs and
turned into land animals, etc., etc. Intelligent
Design Notice, in that Royal Society statement, in the phrase “evolved through Natural Selection”, the misleading and actually un-Darwinian implication that Natural Selection somehow creates variation or mutations in organisms , rather than simply screening or acting on it. Sadly, perhaps as a consequence of the narrow specialisation that necessarily denies virtually all scientists a comprehensive overview of the whole field, the spokesman for the august body then trots out the following favourite falsehood, claiming that ID supporters “make only selective reference to the overwhelming scientific evidence that supports evolution”. [Ed: I wonder if the Royal Society knows, G-Man, that the Discovery Institute (www.Discovery.org) has lists of hundreds of highly qualified and enlightened engineers, doctors, geologists, etc., who now refute the existence of that “overwhelming evidence”?] A
Wise Move The Intelligent Design movement has therefore been very wise in re-engineering the debate, so to speak, and removing barriers to the acceptance of their criticisms by confining their attention to the errors of evolution without making any counter claims regarding Genesis, the age of the earth, or even identifying God as the Intelligent Designer. Instead they focus on the fact that the infantile claims of Darwin and Dawkins, which are an affront to the common sense of any right-thinking person, that the mind-boggling complexity of life on earth somehow created itself accidentally by the endless accumulation of DNA copying errors. Synthetic
Evolution What Dobzhansky did, in a book of his own entitled “Genetics and Origin of Species”, was to explain the concepts much more simply, and attempt to apply them to practical problems of interest to evolutionists. As a result, by1950 Darwin’s theory of evolution by natural selection was universally believed by biologists, and the Synthetic theory version in particular had become widely adopted. Note, however, that biologists at that time still had little notion of the massive complexity that was to be revealed by the scanning electron microscope and the research of Watson and Crick – and even less understanding of how mutations could possibly arise. They simply let their imaginations take flight, assuming, like Darwin himself, that since “micro-evolution” was a fact of life, that any and all organisms therefore had the inbuilt potential for the infinite variation required by “macro-evolution”. Modern evolutionists, such as Derek Hough, however, know better and openly admit that although they accept evolution as a faith, they still have no clue, when confronted by the mind-boggling complexity of the cell, as to how it could possibly have arisen or developed. It
Ain’t Necessarily So! So convincing
was their specious reasoning, at least to young college students, that
Stephen J. Gould, who later became a hero of the evolutionary cause,
said: “I well remember how the ‘synthetic theory’
beguiled me with its unifying power when I was a graduate student in
the mid-1960’s” - but added: “Since then I have been
watching it slowly unravel as a universal description of evolution .
. . I have been reluctant to admit it — since beguiling is often
forever — that the theory, as a general proposition, is effectively
dead, despite its persistence as textbook orthodoxy.” .”
[Ed: I know you shouldn’t belive all you read in the newspapers,
G-Man, but science textbooks too? That’s a bit worrying, old chap.
] As often happens in science, Gould’s term of punctuated equilibrium cleverly describes or labels a phenomenon without actually explaining it – namely the fact that the fossil record continues to show sets of distinct and fully formed organisms rather than the gradual gradation demanded by Darwin. What Gould clearly imagined was that after a stable period of millions of years in which certain organisms thrived in a certain form, “evolution” somehow leapt into explosive action and mutated them into dramatically new and different forms. The paper, later described as a “time bomb”, was apparently ignored by orthodoxy for some five years, until a second paper was published, the outcome of which was a special conferenece in Chicago where, according to a report in “Science” magazine: “Clashes of personality and academic sniping created palpable tension”. ”. [Ed: Apparently the men in white coats had to call in some men in even whiter coats who palpated their collars.] Much of the evidence for the new theory was provided by our old friends the Trilobites – since in passing from one rock strata to the next, dramatically different fossil forms appeared. However, even today, Trilobite buffs are still cracking open lumps of rock and shuffling fossil bits about hoping to discover evidence of some kind of gradual development of one trilobite variety into the next. . [Ed: Once a trilobite, always a trilobite, G-Man.] Speaking of such extinct organisms, Gould said: “They appear in the fossil record looking much the same as when they disappear” – and even more specifically: “In any local area, a species does not arise gradually by the steady transformation of its ancestors; it appears all at once and ‘fully formed’. . [Ed: Pow!!! Splat!!! Take THAT Big D!] Incidentally,
puncutated equilibrium seems to have been a simple reversion to the
early days of evolution when two schools of thought emerged –
the “continous” school who thought like Darwin that evolution
had occurred in tiny steps, and the “discontinous” who saw
change occuring in large steps, i.e. meaningful mutations. The
“Creeps” versus the “Jerks” Forget
the Fossil Record! The
View of Gregor Mendel One year earlier, and evidently somewhat aware of the various evolutionary ideas that were brewing up, and the challenge being posed to the Genesis account of creation, Mendel made the following comments in a lecture: “No one will seriously maintain that in the open country the development of plants is ruled by other laws than in the garden bed. Here, as there, changes of type must take place if the conditions of life be altered, and the species possesses the capacity of fitting itself to its new environment. [However,] nothing justifies the assumption that the tendency to form varieties increases so extraordinarily that the species speedily lose all stability, and their offspring diverge into an endless series of extremely variable forms.” [Ed: Gregor seems to be suggesting that a change in environment can stimulate a creative response in a plant. Interesting idea, G-Man. Didn’t Lamarck have a similar idea?] Notice
that Mendel clearly perceived the Darwin delusion – understanding
that although God had engineered into organisms the ability to adapt
or “fit” themselves to altered “conditions of life”
in “new environments”, “nothing justifies the assumption”
that “extraordinary” and “endless” variation
can take place. [Ed: Evolutionists love assumptions, G-Man.You should
know that. The bigger the better.] Stability
and Change Despite the occurrence of mutations, DNA is actually very stable and very resistant to change – with Professor Sheppard pointing out in his book “Natural Selection and Heredity” that there is a “complicated repair mechanism which often restores the molecule to its original form” if a mistake is made in the self-copying process. This, he says, is why mutations are very rare. He then tests our credulity by happily accepting that , “new and striking varieties arise suddenly”—simply as a result of random individual DNA copying errors. According to G-Theory, all organisms contains versions of the “Self-developing Genome” postulated by Derek Hough, which in addition to a range of ready-made adaptations, to help fit them to purpose and enviornment, after the manner suspected by Lamarck, may also possess the creative power to generate appropriate new mutations in response to need. [Ed: There’s rumour on the web, G-Man, that that DNA now stands for “Darwinism Not Applicable” .] Mendel
Would Turn in his Grave A significant recent overturning of a scientific absolute concerns Mendel’s laws of inheritance, which figure prominently in “Neo-Darwinism” Like people, cats and mice, for example, have “diploid” genes, which means that for each potential body characteristic, such as eye colour, they have two genes, one from each parent. Which gene comes out on top in the ensuing sexual conflict, depends on which is “dominant” and which is “recessive”. [Ed: Mendel invented those terms, G_Man. I suppose you knew that. ] Thus when
two mice mate, the outcome for a particular trait will potentially depend
on four genes, the two in each parent prior mating. In a pure breed,
all four genes for eye colour, for example, could be the same –
so that only one colour would be possible in the offspring. At least
that is the theory, as currently taught in text books. [Sorry, G-Man,
but I am now a bit wary of what I read in biology textbooks. ] Researchers at a university in Nice, in France, have now discovered in breeding experiments involving mice with brown tails and spotted tails that even after several generations, and in direct violation of Mendel’s laws, puppy mice may still be born with spotted tails when neither parent possesses the relevant genes. [Ed: Say it properly G-Man – the spots had been “outbred”.] The researchers suggest that in addition to DNA, the action of which is governed by Mendel’s laws, molecules of RNA must also be transferred in the reproductive process and be instrumental in passing on genetic information no longer present in the genes, a kind of back-door delivery. How this happens is not yet understood, but the team leader stated that “such oddities are likely to be just the tip of the iceberg”. Meanwhile,
the lay observer could be forgiven for assuming from the confident and
highly publicized assertions of evolutionists such as Richard Dawkins,
who declare non-believers in the gospel of Darwin to be literally insane,
that “Evolution” already has all the answers - even attributing
to DNA the creation of mind, personality, consciousness, emotion and
instinct, when the simple fact is, as already noted, they do not even
understand the function of the bulk of the DNA found in cells, casually
dismissing it as so much genetic “junk |
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