Study of chromatin diminution in Cyclopskolensis (Copepoda, Crustacea) by radiobiological methods.

The experimental results show that at doses of 20 Gy and 100 Gy, the development of Cyclopskolensis Lilljeborg, 1901 (Copepoda, Cyclopoida) embryos ceases at the 16-cell stage, without affecting the course of chromatin diminution. A dose of 200 Gy terminated the process of chromatin diminution in some of the embryos. These results support the hypothesis that cytoplasmic factors in the egg play an important role in the process of chromatin diminution.