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jeannot



Posts: 1200
Joined: Jan. 2006

(Permalink) Posted: Dec. 08 2011,01:05   

I wouldn't rule out new mutations.
We tend to consider that the adapted phenotype was some target, and that mutations were unlikely to have affected the right genes at the right nucleotides in such a short amount of time. But this vision is biased.
Consider the whole genome of the lizards. Probably, mutations appeared in each descendent, and some (few) may have to increased their reproductive rate. It's not impossible that they affected the phenotype we see.

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

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