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Comparative Study
. 1992 Nov-Dec;23(6):632-7.

[Cytological study of the nucleolus organizer regions in the chromosomes of CBA and C57BL mice and their hybrids]

[Article in Russian]
E L Patkin, M E Kustova, A P Dyban
  • PMID: 1294927
Comparative Study

[Cytological study of the nucleolus organizer regions in the chromosomes of CBA and C57BL mice and their hybrids]

[Article in Russian]
E L Patkin et al. Ontogenez. 1992 Nov-Dec.

Abstract

Transcriptionally active NORs of chromosomes visualized by AgNO3 staining were studied in bone marrow and embryos (day 10 of gestation) of CBA and C57BL mice, as well as of (CBA x C57BL)F1 hybrids. These mouse strains were shown to differ by the average number of Ag-positive NORs in marrow cells; in hybrids, the number of NORs is greater than in the parent strains. During embryogenesis, the number of chromosomes carrying silver-stained NORs increases; however, no significant differences by this parameter was detected between hybrid and C57BL embryos. The average number of silver-stained NORs was the smallest in embryos of CBA mice.

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