Date: Mon, 01 Dec 2003 02:50:47 -0000
From: "Michael E. Suttkus, II" <suttkus@...
Subject: Re: vitamin C and Msg#31642
--- In DebunkCreation@yahoogroups.com
> > It is known, and has been known for a long
> > time, that primates do not synthesize vitamin C.
> > And that guinea pigs don't either.
> > Here's my prediction: if we check it out at molecular
> > level, we'll find that the vitamin C genes
> > of both humans and chimps have the SAME mutation
> > that causes it not to function, while in guinea
> > pigs, it is some OTHER mutation that causes the failure.
> This seems to be an argument against the
> hypothesis that human beings were specially
> created. However, what would motivate
> anyone to consider that hypothesis?
What does it matter why they would consider it? It's a hypothesis,
> I can only think of two possibilities:
> (a) Some people have an emotional resistance
> to the idea that human beings and chimps have
> common ancestors.
> (b) The doctrines of some religions include
> the claim that human beings were specially
> Suppose we start with the genetic code of a
> human being and trace backwards, imagining
> the genetic codes of ancestors.
> (1) We start with a human being, an organism
> whose body chemistry cannot make vitamin C.
> (2) As we trace backwards, we arrive at an
> organism whose body chemistry could make vitamin C.
> (3) However, if we continue to trace backwards,
> we arrive at an organism whose body chemistry
> could NOT make vitamin C.
> The only alternative to (3) is:
> A complex organism capable of making vitamin C
> arose directly from nonliving matter.
> Either it arose spontaneously or it arose under
> the control of a directing intelligence.
> Now, if we assume that (3) is true, then the following
> questions arise:
> (1) How do we know that those genes that do
> not quite allow our bodies to make vitamin C
> aren't good for something?
If I get up tomorrow and find a car wrapped around the tree in my
front yard, which is the logical response:
1. That's a car that has been smashed into a tree and no longer
2. That looks like a smashed car, but it might have been built that
way and serve some other purpose.
We have a defective vitamin C gene. Worse, we have exactly the same
defective vitamin C gene that chimps have. Trying to pretend that it
might be something else is silly.
\The IDiot will solemnly inform you that chimps and humans are separately
and similarly designed with the defective gene in both.
But if you don't like the vitamin C gene, let's move to the growth
regulator gene that has a transposon stuck in it. Not only can we
identify it's original purpose, but we can tell you what happened to
change it and what would happen were it somehow reactivated. This
isn't rocket science.
\It must be, IDiots can't figure it out.
> (2) If we begin with our ancestors whose bodies
> could make vitamin C and we trace backwards to an
> ancestor of those ancestors--an ancestor whose body
> could NOT make vitamin C--how do we know that
> the defect that prevented vitamin C from being
> made was not exactly the same defect that we now have?
That acestor wouldn't have a non-functional gene just waiting for one
change to turn it into a vitamin C gene. Off happens fast, but
development works in stages.
\Redevelopment of a disabled gene can take a highly roundabout route.
Take the gastrointestinal torsion of the Gastropoda. Apparently a point
mutation caused one muscle to fail, twisting the intestinal tract to
empty just above the head. The Opisthobranchia have reverted to the
normal molluscan condition, but through a complicated process.
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