(urth) Mystery of Ascia

[Lee Berman]

>Entonio: No, they are saying that there may be different alleles which produce a 
>similar phenotype. They are  talking about expressed DNA. It's not a matter of 
>having a couple of  different bases which make no difference on the result. The coded  
>proteins may differ in structure yet not in function. 
  
I understand what you are saying but it is a different question being addressed.
 
The Wikipedia quote Gerry cited was: 
 
"a great deal of genetic variation is hidden in the form of alleles that do not produce 
obvious phenotypic differences."
 
We are talking about a principle of natural selection and evolution. Natural selection
can only act on phenotype. And if there is no "obvious difference" between two phenotypes
the difference is invisible to natural selection.