[Ichneumon:] Where did you get that incorrect idea from?
[Elsie:] From 'E's.................. "..a change has occurred that enhances an organisms offspring's surviability" This is, by definition, a 'small gene pool'.
No. You clearly don't understand what a gene pool is. "By definition", a gene pool is:
Evolution is a change in the gene pool of a population over time. A gene is a hereditary unit that can be passed on unaltered for many generations. The gene pool is the set of all genes in a species or population.
-- from Introduction to Evolutionary Biology (which I suggest you read before you attempt more posts on this thread)
The fact that a mutation first occurs in a single individual doesn't magically make the species's gene pool a size of "one". That individual still resides within a larger population, which contains many other genes available for genetic "mix-and-match".
For my safety
or so that I won't appear to be so stupid in your eyes?