Ibragimov, Rustam2009-02-182007Ibragimov, Rustam. 2007. Thou shalt not diversify: Why "two of every sort?" Journal of Applied Probability 44(1): 58-70.0021-9002http://nrs.harvard.edu/urn-3:HUL.InstRepos:2623763This paper presents a study of the intertemporal propagation of distributional properties of phenotypes in general polygenic multisex inheritance models with sex- and time-dependent heritabilities. It further analyzes the implications of these models under heavy-tailedness of traits' initial distributions. Our results suggest the optimality of a flexible asexual/binary mating system. Switching between asexual and binary inheritance mechanisms allows the population effectively to achieve a fast suppression of negative traits and a fast dispersion of positive traits, regardless of the distributional properties of the phenotypes in the initial period.en-USphenotypic traitheritabilitytime seriesmultifactorial inheritancemultisex inheritance model10.1239/jap/1175267163