From: Scott Chase (email@example.com)
Date: Mon 04 Aug 2003 - 15:51:47 GMT
>From: derek gatherer <firstname.lastname@example.org>
>Subject: Re: Defining the word "replicator" (was Re: Silent memes)
>Date: Mon, 4 Aug 2003 08:54:13 +0100 (BST)
> --- AaronLynch@aol.com wrote: > In a message dated
>8/1/2003 4:02:47 AM Central
> > terms of "Longevity, Fecundity, Fidelity." I take
> > this to
> > be a tenet of evolutionary theory (subject to
> > empirical
> > testing and re-testing, logical analysis, etc.)
> > rather than
> > another definition per se.
>No, they are part of the definition. For instance,
>your Y-chromosome is a replicator, but none of your
>autosomes are. By definition. Why? Because the
>autosomes don't satisfy the Longevity criterion
>(because of recombination). Simple as that.
>Dawkins' notion of the replicator is built on
>Williams' notion of the 'evolutionary gene'. The
>definitions were already clear enough by the mid-60s.
What proportion of a genome (eg- the human genome) actually codes for anything versus the proportion which is non-genic? A so-called "evolutionary gene" would include portions of the genome that code for nothing of cellular significance. These regions could not easily be construed as a "molecular gene" (ie- related to to genomic regions allowing for transcription into RNA's or translation into peptides).
I suppose the distinction between evolutionary and molecular genes has
little bearing on these regions acting as replicators, but there's a bit of
confusion when one starts talking about "selfish" genes which could be
non-coding fragments that are neutral or nearly neutral "junk" with regards
to individual fitness and regions that are organized in such a way that they
are told by regulators above them in the hierearchy when to transcribe RNA
or to StF up.
Help STOP SPAM with the new MSN 8 and get 2 months FREE*
This was distributed via the memetics list associated with the
Journal of Memetics - Evolutionary Models of Information Transmission
For information about the journal and the list (e.g. unsubscribing)
This archive was generated by hypermail 2.1.5 : Mon 04 Aug 2003 - 15:57:55 GMT