Register | Sign In


Understanding through Discussion


EvC Forum active members: 64 (9164 total)
3 online now:
Newest Member: ChatGPT
Post Volume: Total: 916,879 Year: 4,136/9,624 Month: 1,007/974 Week: 334/286 Day: 55/40 Hour: 0/2


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Author Topic:   The origin of new genes
Fosdick 
Suspended Member (Idle past 5528 days)
Posts: 1793
From: Upper Slobovia
Joined: 12-11-2006


Message 128 of 164 (371124)
12-20-2006 11:16 AM
Reply to: Message 126 by Philip
12-19-2006 7:52 PM


Re: Brand-Spanking-New Alleles (Again)
Phillip, you asked:
Do any of you really believe multiple repressed deleterious genes (in a gene pool) can become assimilated together (via NS) as a *punctuated* beneficial mutation in a gene pool. Can this *explain* 'Pre-Cambrian events' of fossil records?
I'm unsure about what you mean here. Are you conflating genes with alleles, perhaps? Or, possibly, it's the notion of "deleterious genes" that confuse me, ones that "...can become assimilated together (via NS) as a 'puncuated' beneficial mutation..." What?
Without a firm grasp of your point, I would want instead to invoke S. J. Gould's argument for "exaptation" to explain how an ineffectual allele might be drawn into service by circumstantial changes that register in the gene pool. Exaptation can explain a lot, usefully displacing those grandiose notions of convergence and homoplasy.
”Hoot Mon

This message is a reply to:
 Message 126 by Philip, posted 12-19-2006 7:52 PM Philip has replied

Replies to this message:
 Message 129 by Philip, posted 02-20-2007 8:14 PM Fosdick has replied

  
Fosdick 
Suspended Member (Idle past 5528 days)
Posts: 1793
From: Upper Slobovia
Joined: 12-11-2006


Message 130 of 164 (386374)
02-21-2007 11:20 AM
Reply to: Message 129 by Philip
02-20-2007 8:14 PM


Alleles and Exaptation
Conflating alleles with genes?
--Guilty as charged?
Well, of course alleles function as genes, but genes do not function as alleles. Try this:
allele : gene :: oak : tree.
Exaptation is probably the only mega-ToE mechanism I could remotely consider (as a podiatrist and programmer).
The real problem with exaptation is that it seems "built in" to be viable:
1) Exaptation within 'extremely primitive' life forms seems statistically impossible (DNA codons, left-handed helixes, etc.)
2) If indeed exaptation has occurred (at all), it would have to take place in *modernish* organisms that have so many bio-systems built-in already.
3) The abused metaphor of a GPS auto-navigation NS-mutating into "driver-intelligence" is too metaphysical and religious for me to accept in my materialistic logic.
(Hopefully, we'll discuss more on this exaptation principle)
Maybe someone put a Mickey my morning coffee, but I can't make any sense of this.
”HM

This message is a reply to:
 Message 129 by Philip, posted 02-20-2007 8:14 PM Philip has replied

Replies to this message:
 Message 131 by Philip, posted 02-21-2007 11:06 PM Fosdick has not replied
 Message 133 by RAZD, posted 02-22-2007 7:27 AM Fosdick has not replied

  
Newer Topic | Older Topic
Jump to:


Copyright 2001-2023 by EvC Forum, All Rights Reserved

™ Version 4.2
Innovative software from Qwixotic © 2024