[The intercellular interactions in the ontogeny of Notch-84k35 mutant specimens of Drosophila melanogaster].

The Notch-84k35 mutants of Drosophila melanogaster with hypertrophy of the nervous system and changed pattern of the embryo organization were used for studying cell interactions between different embryonic layers. The purposeful migration of mesodermal cells toward ectoderm on the dorsal side of the embryo is described. It is shown that differentiation of the visceral muscles does not depend on the development of endodermal layer.