Newsgroups: comp.ai.alife
Path: cantaloupe.srv.cs.cmu.edu!das-news2.harvard.edu!fas-news.harvard.edu!newspump.wustl.edu!news.starnet.net!wupost!howland.reston.ans.net!pipex!sunic!news.chalmers.se!news.gu.se!gd-news!d6243
From: sa209@utb.shv.hb.se (Claes Andersson)
Subject: Re: Lamarckian Evolution
Message-ID: <1995Jan19.162530.10983@gdunix.gd.chalmers.se>
Sender: usenet@gdunix.gd.chalmers.se (USENET News System)
Nntp-Posting-Host: d6243.shv.hb.se
Organization: Dept. of economy and computer science.
X-Newsreader: News Xpress Version 1.0 Beta #2.1
References: <1995Jan18.165850.75699@ucl.ac.uk>
Date: Thu, 19 Jan 1995 22:42:15 GMT
Lines: 22

Chris Harris <charris@cs.ucl.ac.uk> wrote:
>If Lamarckian evolution is a possibility (and I might as well add here
>that I don't consider it so) then how do its exponents explain the
>amazing changes it must make to our genomes. If an organism picks up,
>during its lifetime, a number of useful traits,

which it somehow genetically encodes,
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>where does it put them? Does it just add these
>sequences on to the end (i.e. new genetic material) or does it
>replace ones that are already there so that the genome length is
>preserved? If the latter, then how does it do that, and how does it
>decide which ones to 'get rid of'. If the former were the case then
>our genome would be getting longer and longer...

 Thank you. Eventually someone who seems to have an idea of
why Lamarchian evolution is impossible. Where to put the DNA is
the least problem, the line that is underlines with exclamation marks
is the important one! HOW would it encode a scar or something?

Claes Andersson. University of Bors. Sweden

