Okay, so here’s the place you can download the really simple population genetics simulation thingy I mentioned today: http://wps.prenhall.com/esm_freeman_evol_3/12/3315/848837.cw/index.html
Your different alleles (so types of a gene, remember) are labbeld A1 and A2. You can give their respective genotypes fitness values, the higher the fitness #, the more they benefit the organism carrying them. Everything else is pretty self-explanatory, except maybe the inbreeding coefficient, which is the probability f of an individual breeding with a relative (who, by definition, is carrying the same alleles).
Anyways, to see what they’re talking about in the Lynch paper, play around with the population size and fitness levels. I have a screenshot of what I did, but cannot for some reason get it to upload on photobucket…