--- In Ferret-Genetics@yahoogroups.com, Sukie Crandall <sukiec@...> wrote:

> No, that also occurs with gradual pressures upon a population.
>
> Remember to not confuse the shifts in rates that happen with
> population genetics with the changes in an individual which is regular
> genetics.
>
> When the shift in proportion of a given allele (and its outward
> results) happens slowly over time that is gradualism. When it happens
> rapidly that is punctuated equilibrium. Rate may reflect changes
> causing die-out, may reflect changes in alleles that turn things on or
> off (or otherwise have a major effect upon how multiple genes are
> expressed if the effect is large) OR mutations in areas which have
> smaller effects if th change is smaller, etc.
>
> > changes in environment and diet are often subtle over generations.
> >
> And cause subtle changes in die-out, but do NOT alter the genes
> themselves (unless they are mutagenic exposures but that is not a
> directed change in that what is altered or in what way).
>
> Lemarckianism isn't genetic reality.


I am definitely not stating things very well here. Lemarkianism is not where I
was trying. Simply put, I was just trying to state that stress is a catalyst for
evolutionary change. Which has been proven.

Roseann