Received: by alpheratz.cpm.aca.mmu.ac.uk id XAA17503 (8.6.9/5.3[ref pg@gmsl.co.uk] for cpm.aca.mmu.ac.uk from fmb-majordomo@mmu.ac.uk); Tue, 13 Feb 2001 23:19:15 GMT X-Originating-IP: [209.240.221.102] From: "Scott Chase" <ecphoric@hotmail.com> To: memetics@mmu.ac.uk Subject: Re: Less genes than expected Date: Tue, 13 Feb 2001 18:16:44 -0500 Content-Type: text/plain; format=flowed Message-ID: <F60Stui3cJvgNuLpPyl00011749@hotmail.com> X-OriginalArrivalTime: 13 Feb 2001 23:16:44.0508 (UTC) FILETIME=[07C219C0:01C09613] Sender: fmb-majordomo@mmu.ac.uk Precedence: bulk Reply-To: memetics@mmu.ac.uk
>From: <Zylogy@aol.com>
>Reply-To: memetics@mmu.ac.uk
>To: memetics@mmu.ac.uk
>CC: Zylogy@aol.com
>Subject: Re: Less genes than expected
>Date: Mon, 12 Feb 2001 16:17:48 EST
>
>We have embryonic hemoglobin, fetal, and several other varieties active
>during different life-stages. The reason is that in the womb, the
>developing
>offspring's hemoglobin has to have a higher oxygen affinity than mom's, or
>there will be no tendency to chemically transfer off the one to the other
>in
>the world of equilibrium effects. Later we are of different sizes and
>energy
>economy, and we need different forms to cover that too. If this is the
>norm,
>then very many gene products will be tailored to environmental specifics,
>either hard-wired into the genome or edited after transcription- it really
>doesn't matter in the end so long as the "right" match is gotten.
>
Thanks for posting on the different hemoglobins. I was trying to remeber how
the family is organized and too lazy to look it up.
>
>Behavior works the same- inflexibility is similar in spirit to having only
>one protein molecule with one activity profile. More brain cells yields
>more
>fluidity of response (over various different brain structures, cortical
>columns, or what-have-you)- that's one of the reasons that small animals
>have
>very jerky movements, and seemingly quantized response "packages" to
>various
>stimuli.
>
>
There's also that so called open versus closed program dichotomy for
behavior. In developmental processes some organisms are more flexible than
others too.
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