[Incidence of dominant lethals in the progeny of young male house mice (Mus musculus L.) after exposure to excretory products of mature males of the same species].

The influence of biologically active substances of excretory products (EP) of house mouse adult males on reproductive function of young males was studied with the help of the dominant lethal test. Mortality of the progeny and frequency of nonpregnant females were analysed on the 6th and 8th weeks after EP exposure. Preimplantation and postimplantation mortality frequency increased significantly (P less than 0.

[Dynamic analysis of the induction of chromosome aberrations in the bone marrow cells of laboratory mice].

A study was made of the incidence of such damages as breaks, gaps, and exchanges occurring in bone marrow cells of CBA mice after irradiation with a dose of 12.9 mC/kg. Males and females exhibited a similar spontaneous chromosome aberration level.