2 PHASES OF EVOLUTIONARY MORPHOGENESIS IN MICROEVOLUTION

The general ''plan'' of animal structure evolves due to the changes bo th, in body proportions and body size. The method allowing to estimate the level of population differentiation according to these two parame ters was considered. In the process of population differentiation two phases of form formation can be discerned. On the first stage of micro evolution the morphogenesis mainly proceeds by proportion changes. The next stage is characterised primarily by changes of size, The same ph ase can be observed at intra-population level. The selection directed to the increase in differentiation of individuals according to their p roportions.