Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

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

 Messages: [ Previous | Next ]
 David Beorn Posts: 4 Registered: 12/12/04
Re: Several questions on evolution, and mutation (rate)
Posted: Aug 29, 1996 11:50 PM

On 27 Aug 1996, Joan Shields wrote:

> From: Joan Shields <joan@med.unc.edu>
> Newgroups: sci.bio.technology, sci.bio.misc, sci.math,
> bionet.molbio.evolution, bionet.microbiology
>
> Stats haven't always been one of my strong points but there is something I
> think I can add - something I think a lot of people are overlooking.
>
> Whether or not is would take, on average, X numbers of tries in order to
> form amino acids - you have to remember that all those different
> combinations didn't/don't occur one right after the other - they can
> happen all at once. In other words, evolution doesn't just happen in a
> straight line - mutations occur everywhere and in every direction. If you
> look at mutations that have been successful, then it appears that
> evolution is going in a line (or meandering path).

But they have to occur at the right time in combination with a
lightening strike, etc.

> Just look at how variable HIV is. All these mutations all occuring at the
> same time - some are viable and some aren't. Some are better at surviving
> for a while or better at transmission or better at eluding drugs and the
> body's own systems.

But in all cases, it is STILL HIV, right?? I.e. no evolution occurred -
adaptation, variability of a species yes - but not evolution. No new
"creature" was created.

> Anyway, hope this made sense. Oh, and one more thing - who ever said that
> evolution had to be constant? From what I've read there's been some
> debate as to how constant the rate is.

Yes - punctuated equilibrium says it happened in spurts

> That's the funny thing about nature - we try to make it fit into very
> simplistic creations of our own - get very irritated when she refuses to
> fit :).

Or just assert that it DOES fit when some get frustrated - instead of
considering all the evidence.

Dave

> joan

*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^
* David Beorn, david.beorn@pobox.com (internet) *
* Virginia FREENET *
*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^

~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'

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