[Genetic structure of the native populations of the northeastern USSR. II. Phenotype frequencies of the polymorphic systems in generations of the coast Chukchi].

Reliable differences between phenotype frequencies in generations for six of ten polymorphic systems were received. Unequal selective value of separate phenotypes at different stages of ontogeny is supposed, which results in heterogeneity of generations in a population. A possible significance of ecological factors in the formation of the genotypic structure of a population is discussed.