[The morphogenetic characteristics of the gametes and the physiological features of animal reproduction in relation to their hydridization].

Data of analysis of morphogenetic character of spermii in 100 species of mammals and some hybrid forms, anatomical and physiological peculiarities of reproduction of animals of various taxonomic groups, reproduction and biological suitability of generative elements of distant hybrids reflect their biological interrelation in the zoological series. It is conditioned by genetical, physiological and biochemical factors and reveals itself in different effectiveness of hybridisation processes which are determined by genealogical proximity of initial species.