[Robertsonian translocation in a cattle population].

Robertsonian translocation (centric fusion) is one of the most frequent types of chromosome aberrations found in cattle. Observing the health state of a group of dairy cows in the fallout region of a metallurgical plant, centric fusion of chromosomes was discovered in one animal. Chromosome fusion is supposed within pairs 13-24 (dicentric translocation).

[Lactate dehydrogenase isoenzymes in purebred sheep and rams].

In farm animals the questions of clinical and mainly heritable health receive increased attention. In this work the activity of the polymorphous system of lactate dehydrogenase was observed in some pure- and crossbred ewes and rams under field conditions. The isoenzyme of lactate dehydrogenase were separated on 5.

[Chromosome aberrations in the peripheral lymphocytes in breeding sheep stock].

The health of animals depends not only on the level of hygiene on the farms but also on the ability of the individual to withstand diseases and to face various unfavourable effects of the environment. On the cellular level, chromosome analysis in the peripheral lymphocytes of farm animals is used to determine the effects of various environmental factors. According to present knowledge the frequency of chromosome aberrations is considered to be a quantitative index of genetic damage.