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Topic: Several questions on evolution, and mutation (rate)
Replies: 52   Last Post: Sep 8, 1996 9:44 PM

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 Herman Helmuth Posts: 1 Registered: 12/12/04
Re: Several questions on evolution, and mutation (rate)
Posted: Aug 30, 1996 3:24 PM

Steve McGrew wrote:
>
> In article <Pine.ULT.3.91.960825034630.14248E-100000@freenet.vcu.edu>,
> David Beorn <dbeorn@freenet.vcu.edu> wrote:
>

> > Well, I don't know that we can say with CERTAINTY that life evolved but
> > people certainly do SAY it. I've heard calculations that to just form
> > one protein (amino acid?? I think) by chance, one of the building
> > blocks of life is 10 to the 46th power - and that's not even life. So the
> > probability for life is significantly greater than that. And the time
> > involved is significantly greater than the longest estimates for the age
> > of the earth - so what conclusions should you draw from this??

>
> What do you suppose the person who did those calculations meant by the
> term "by chance"? My guess is that he calculated the number of different
> possible amino acid chains of some particular length, and called the
> reciprical of that the probability that any one chain of that length would
> come into existence.
>
> In that case, the calculation is wrong, wrong, wrong. In genetic
> algorithms, which are systems that evolve in ways crudely analogous to
> biological systems, it is not uncommon to find the one optimum solution
> out of 10 to the 50th possible solutions, while only actually looking at
> 10 to the 4th trial solutions. In other words, evolution uses
> stochastistic processes, but gets to where it's going very fast.
>
> You really can't get a clear understanding of evolution, I think,
> without hands-on experience. One way to get hands-on experience is to
> download a genetic algorithm demo and play with it for a few months.
> Another is to carry out some of the lab procedures like those of Frances
> Arnold or Gerry Joyce, where just a few generations of mutation, selection
> and reproduction produce RNA or amino acid sequences with greatly improved
> properties.
>
> Steve McGrew
>
> --
> Steve McGrew | stevem@comtch.iea.com
> New Light Industries, Ltd. | www.iea.com/~nli
> 9713 W. Sunset Hwy | phone 509-456-8321
> Spokane, WA 99204 USA | fax: 509-456-8351
>

Date Subject Author
8/15/96 Andrew Singer
8/16/96 Lluis Ribas
8/16/96 Doug Yanega
8/17/96 Leonard Evens
8/16/96 KIRKX L AUGUSTIN
8/17/96 Leonard Evens
8/28/96 Brian Williams
8/29/96 Lauren Owens
8/18/96 Felix J. Thibault
8/20/96 Vincent R. Johns
8/23/96 Richard M Kliman
8/25/96 David Beorn
8/26/96 Vincent R. Johns
8/27/96 Steve McGrew
8/27/96 James Foster
8/29/96 David Beorn
8/30/96 James Foster
8/31/96 L.A. Moran
9/3/96 James Foster
9/4/96 L.A. Moran
9/4/96 James Foster
9/4/96 Ram Samudrala
9/4/96 James Foster
9/4/96 Ram Samudrala
9/5/96 James Foster
9/5/96 Ram Samudrala
9/6/96 James Foster
8/27/96 Joan Shields
8/28/96 Steve McGrew
8/29/96 David Beorn
8/30/96 Jerry Learn
8/31/96 Doug Easton
8/30/96 Larry Edwards
8/30/96 Doug Yanega
9/7/96 David Beorn
8/27/96 David Dixon
8/28/96 Dana Gourley
8/30/96 Herman Helmuth
9/6/96 Jerry Clark
8/22/96 Truett L Smith
8/28/96 Brian Williams
8/23/96 Karl
8/24/96 Steve McGrew
8/25/96 Arthur Chandler
8/21/96 vorsterd@iafrica.com
8/22/96 Anthony Campbell
8/22/96 Mary K. Kuhner
8/31/96 Arthur Chandler
9/4/96 David Wilson
9/6/96 Ram Samudrala
9/8/96 David Wilson