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Due to the growing interest in the intensification of beef cattle production and improvement of meat quality, it is necessary to use karyotype control in selection of animals. This paper discusses chromosomal aberrations in beef cattle. It is well known that in beef cattle in particular structural and numerical aberrations (Robertsonian translocations, trisomy of autosomal and sex chromosomes) and...
The studies were performed on 890 oocytes collected from 67 ovaries. For cultivation in vitro 302 oocytes were qualified. Cytogenetic slides were made from 236 oocytes cultivated in vitro. Out of them only 103 oocytes (44%) proved to be suitable for cytogenetic analysis. It was found that: 28% of the oocytes were at metaphase I, 4% at anaphase I, 14% at telophase I and 54% at metaphase II of meiosis...
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