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Author Topic:   What is Salty's 'semi-meiotic hypothesis'
Percy
Member
Posts: 22505
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.4


Message 26 of 63 (37621)
04-22-2003 6:39 PM
Reply to: Message 23 by John A. Davison
04-22-2003 6:11 PM


Re: In a nutshell...
Salty writes:
I won't give natural selection any credit for anything.
Maybe you can explain what, in your view, is wrong with this:
No organism has perfect DNA. You can always find places where a change would be for the better. If we consider only single-base-pair mutations, then a random mutation has the possibility, however slight, of occurring in a place where it would improve the organism.
Most mutations will be neutral to negative, and natural selection will proportionally weed out the more negative mutations. The small number of positive mutations will be selected for and will increase in proportional representation in the population.
This process continues for generation after generation, gradually improving the organism's adaptation to the environment, and allowing it to respond to changes in the environment.
--Percy

This message is a reply to:
 Message 23 by John A. Davison, posted 04-22-2003 6:11 PM John A. Davison has replied

Replies to this message:
 Message 27 by John A. Davison, posted 04-22-2003 6:50 PM Percy has replied

Percy
Member
Posts: 22505
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.4


Message 32 of 63 (37672)
04-23-2003 10:39 AM
Reply to: Message 27 by John A. Davison
04-22-2003 6:50 PM


Re: In a nutshell...
Hi Salty,
Estimates vary, but it wouldn't be too far off the mark to say that the human and chimpanzee genomes are only 2% different. Given that it doesn't take much of a genome difference to create a new species, how do you support this statement:
Salty writes:
Percy, that is fine to the extent it may occur, but it will never lead to a new species.
Again, just considering single base-pair changes to keep things simple, over time such changes will accumulate, and there is nothing to keep the changes from reaching 1% different, then reaching 2% different, and then reaching 3% different, and so forth. At some point the differences will reach the point where the changed population and the original population are no longer interfertile, thus giving rise to a new species. Given that there's no limit to the accumulation of differences, what is to prevent speciation from happening?
--Percy

This message is a reply to:
 Message 27 by John A. Davison, posted 04-22-2003 6:50 PM John A. Davison has not replied

Percy
Member
Posts: 22505
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.4


Message 36 of 63 (37688)
04-23-2003 3:13 PM
Reply to: Message 35 by John A. Davison
04-23-2003 2:07 PM


Re: In a nutshell...
Salty writes:
The word evolution is not synonymous with Darwinism although one might think so judging from some of the responses I have elicited.
And the difference is...?
--Percy

This message is a reply to:
 Message 35 by John A. Davison, posted 04-23-2003 2:07 PM John A. Davison has replied

Replies to this message:
 Message 37 by John A. Davison, posted 04-23-2003 3:19 PM Percy has replied

Percy
Member
Posts: 22505
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.4


Message 40 of 63 (37715)
04-23-2003 4:15 PM
Reply to: Message 37 by John A. Davison
04-23-2003 3:19 PM


Re: In a nutshell...
And Crashfrog was being ironic.
Salty writes:
P. your response speaks volumes. Darwinism is evolution? Why of course it is!
In your view, what is the difference between evolution and Darwinism?
--Percy

This message is a reply to:
 Message 37 by John A. Davison, posted 04-23-2003 3:19 PM John A. Davison has replied

Replies to this message:
 Message 41 by John A. Davison, posted 04-23-2003 7:26 PM Percy has replied

Percy
Member
Posts: 22505
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.4


Message 50 of 63 (37822)
04-24-2003 9:47 AM
Reply to: Message 41 by John A. Davison
04-23-2003 7:26 PM


Re: In a nutshell...
Hi Salty,
In your view, what is the difference between evolution and Darwinism.
--Percy

This message is a reply to:
 Message 41 by John A. Davison, posted 04-23-2003 7:26 PM John A. Davison has not replied

Percy
Member
Posts: 22505
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.4


Message 55 of 63 (37918)
04-24-2003 5:54 PM
Reply to: Message 53 by John A. Davison
04-24-2003 5:14 PM


Re: truly incredible...
Hi Salty,
In your view, what is the difference between evolution and Darwinism.
--Percy

This message is a reply to:
 Message 53 by John A. Davison, posted 04-24-2003 5:14 PM John A. Davison has replied

Replies to this message:
 Message 56 by John A. Davison, posted 04-24-2003 6:59 PM Percy has replied

Percy
Member
Posts: 22505
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.4


Message 58 of 63 (37953)
04-24-2003 9:45 PM
Reply to: Message 56 by John A. Davison
04-24-2003 6:59 PM


Re: truly incredible...
Hi Salty,
That doesn't really help me understand the difference between evolution and Darwinism. Could you please explain?
--Percy

This message is a reply to:
 Message 56 by John A. Davison, posted 04-24-2003 6:59 PM John A. Davison has replied

Replies to this message:
 Message 59 by John A. Davison, posted 04-25-2003 7:52 AM Percy has replied

Percy
Member
Posts: 22505
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.4


Message 61 of 63 (38004)
04-25-2003 9:58 AM
Reply to: Message 59 by John A. Davison
04-25-2003 7:52 AM


Re: truly incredible...
Hi Salty,
As Mammuthus has pointed out, the word "evolution" has more than one meaning, and so you're just playing semantic games. It was pretty clear from context that people were not using your definition of evolution. I, for one, will not be typing "biological evolution" or "theory of evolution" very often, but will either write "evolution" or "TOE".
Depending upon context, Darwinism can be a synonym for the modern theory of evolution, or it can refer to the theory of evolution as it existed before the modern synthesis, or it can be a loaded term as Mammuthus mentions. Because of its vagueness I rarely introduce the term myself.
--Percy

This message is a reply to:
 Message 59 by John A. Davison, posted 04-25-2003 7:52 AM John A. Davison has not replied

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