RSS 2.0 Feed

» Welcome Guest Log In :: Register

Pages: (13) < [1] 2 3 4 5 6 ... >   
  Topic: Southstar's thread< Next Oldest | Next Newest >  
Southstar



Posts: 150
Joined: Nov. 2011

(Permalink) Posted: 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

--------------
"Cows who know a moose when they see one will do infinitely better than a cow that pairs with a moose because they cannot see the difference either." Gary Gaulin

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

Pages: (13) < [1] 2 3 4 5 6 ... >   


Track this topic Email this topic Print this topic

[ Read the Board Rules ] | [Useful Links] | [Evolving Designs]