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Tracy P. Hamilton



Posts: 1237
Joined: May 2006

(Permalink) Posted: Dec. 07 2011,10:32   

Quote (Southstar @ Dec. 07 2011,09:57)
Quote (oldmanintheskydidntdoit @ Dec. 06 2011,13:03)
Perhaps this recent example?

Lizards Undergo Rapid Evolution After Introduction To A New Home

 
Quote
“Our data shows that evolution of novel structures can occur on extremely short time scales. Cecal valve evolution probably went hand-in-hand with a novel association between the lizards on Pod Mrcaru and microorganisms called nematodes that break down cellulose, which were found in their hindguts.”

Hi,

The objection made to this article is that there is no proof of novel genetic material in the study. Actually in all fairness it does state "Tail clips taken for DNA analysis confirmed that the Pod Mrcaru lizards were genetically identical to the source population on Pod Kopiste."

So one could assume that the mutations are only induced by the enviroment and are not genetic based?

another thing I have replied to this saying that the development of the Cecal valve which is only been developed on the lizards of one island can only be produced with an increase of the amount of genetic material. Would this be correct?

Or would it be possible that these genes were somehow latent and were only expressed when the animal turned to a heavier herbivourous diet?

Thanks
Marty

There is proof in Lenski's experiment.

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"Following what I just wrote about fitness, you’re taking refuge in what we see in the world."  PaV

"The simple equation F = MA leads to the concept of four-dimensional space." GilDodgen

"We have no brain, I don't, for thinking." Robert Byers

  
  366 replies since Nov. 08 2011,06:46 < Next Oldest | Next Newest >  

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