I am in a query ,how genetic polymorphisms occur in genome of populations ?? is it a sort of cross linking during meiosis or it occur during gametogenesis ?? polymorphisms means multiple variants of the same gene , so if the genes are variants ,will this affect the function of the protein that is transcribed or any ALTERED phenotypic effect ? although the difference between every indiviual is the polymorphisms in DNA (0.5%) ONLY !