Thread: New Information?
September 14th 2007, 03:35 PM #1
In a recent piece of research (1), scientists were able to demonstrate that ordinary baker’s yeast Saccharomyces cerevisiae, arose via a whole genome duplication from an ancestor somewhat like Kluyveromyces waltii. They saw interleaved clusters of genes forming a 2:1 ratio. They could find direct comparisons between genes of the two species. Gene order between the two species was maintained. Thus the authors of the article wrote:-
Originally posted by Reference (1)
Following the WGD, the evidence is that most genes were simply and quickly removed from the genome of S. cerevisiae as it tried to stabilize. Roughly 10% of the duplicated genes did survive however and of these, some of either pair did so by taking on new functions that did not exist in the ancestral species. Many others of either pair did so by evolving new functions from ancestral but differing functions.
My question is:-
Leaving aside the tricky question of a definition of information, how can anyone argue that this is not a gain? A species now exists that did not exist before and it has somewhat more DNA than the critter it came from, with that DNA coding for functions that did not exist in the ancestor.
(1) Manolis Kellis, Bruce W. Birren & Eric S. Lander, “Proof and evolutionary analysis of ancient genome duplication in the yeast Saccharomyces cerevisiae”, Nature 428 8-April-2004, pages 617-624.rjw
September 15th 2007, 05:10 AM #2
Re: New Information?From darkness into light
Like icy shards from the broken mirror within
Melting in the tears from the stars in your eyes
Shining still brighter, still fainter through the darkness
The love between you and me, a trace of dawn
September 15th 2007, 07:25 AM #3
Re: New Information?
Well even though Jorge has been quite active, he has ignored it so far. That is one method of Jorge for "countering" things.
Now that this little dig is posted he will probably chip in with an insult.
Beyond these, he will do nothing. Frankly I doubt if he understands what is being argued and why.
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