Loudmouth:
So, saying that the effect on fitness is random isn't quite accurate, rather mutations are random changes in the DNA which may or may not affect fitness.
Judge:
So does it mean random as in "unpredictable".
Is it that the "mutagen" (is that right) is not disposed in any particular way WRT fitness?
Loudmouth:
I can look up some papers for you if you wish, but suffice it to say that studies that have looked at antibiotic resistance in bacteria, for example, have not seen the same mutation occuring among all resistant bacteria. It doesn't look like there is a mechanism that allows organisms to specifically change their DNA in response to an environmental stress. Rather, mutants are selected for by the environment.
Judge:
That would be great if you have the time. I am trying to learn more about the science of this and how science actually works.
[This message has been edited by judge, 11-25-2003]