Re: [asa] Lab speciation

And we should remember that there are also error checking mechanisms which will catch most of the initial errors that are point mutations.

James Mahaffy (mahaffy@dordt.edu) Phone: 712 722-6279
498 4th Ave NE
Biology Department FAX : 712 722-1198
Dordt College, Sioux Center IA 51250-1697
>>> "Randy Isaac" <randyisaac@comcast.net> 06/04/08 7:28 PM >>>
Murray wrote:
>
> (1) Are my remarks re "detrimental, usually fatal" effects of mutations a
> fair assessment of the data - or an expression of ignorance of same?

Harmful mutations result in low or nonexistent reproductive success and
therefore quickly disappear from the landscape. They may be more frequent or
not, it really doesn't matter. Natural selection acts at many levels, from
the embryo to the whole organism. The key is that mutations per se are
relatively rare leading to some degree of stability.

Randy

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Received on Thu Jun 5 10:19:31 2008