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1

Description of the mallard duck (Anas platyrhynchos) karyotype

100%
Wojcik E., Smalec E.
Folia Biologica
|
2007
|
vol. 55
|
issue 3-4
115-120
EN
The karyotype of the mallard duck, Anas platyrhynchos, was characterised on the basis of R and C bands. Chromosomal preparations obtained from in vitro blood lymphocyte cultures were RBG- and CBG-stained. The structures of nine and 14 pairs of chromosomes were analysed by the RBG and CBG chromosome banding techniques, respectively. The location of R bands, as well as the size and arrangement of constitutive heterochromatin blocks were determined. Ideograms of R and C banded patterns of the analysed chromosomes were drawn. The morphological makeup of the analysed chromosomes was assessed.
2

Description of the Anser cygnoides goose karyotype

100%
Wojcik E., Smalec E.
Folia Biologica
|
2008
|
vol. 56
|
issue 1-2
37-42
EN
The karyotype of the domestic goose A. cygnoides was characterised on the basis of R and C bands. Chromosomal preparations obtained from an in vitro culture of blood lymphocytes were stained by means of the RBG and CBG banding techniques. The first nine pairs of chromosomes were analysed by the R banding technique, while fourteen pairs of chromosomes were analysed by the C banding technique. The localisation of R bands as well as the sizes and positions of constitutive heterochromatin blocks were determined. Ideograms of R and C banded patterns for the analysed chromosomes were drawn. The morphological make-up of the analysed chromosomes was assessed.
3
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Structure and functions of lampbrush chromosomes

100%
Andraszek K., Smalec E.
BioTechnologia
|
2011
|
issue 4
4

Description of the Anser anser goose karyotype

100%
Wojcik E., Smalec E.
Folia Biologica
|
2007
|
vol. 55
|
issue 1-2
35-40
EN
The karyotype of the Italian goose originating from Anser anser was characterised on the basis of R and C bands. Chromosomal preparations obtained from an in vitro culture of blood lymphocytes were stained with the RBG and CBG techniques. The RBG technique enabled the analysis of the structure of nine pairs of chromosomes whereas the CBG technique ? fourteen pairs of chromosomes from the total of eighty goose chromosomes. The morphology and the R and C banding patterns were described. The size and arrangement of the blocks of constitutive chromatin were determined. Ideograms of R and C banded patterns were drawn. The morphological structure of the analysed chromosomes was evaluated.
5

Description of the Muscovy duck (Cairina moschata) karyotype

100%
Wojcik E., Smalec E.
Folia Biologica
|
2008
|
vol. 56
|
issue 3-4
243-248
EN
The karyotype of theMuscovy duck originating from Cairina moschata was characterised on the basis of R and C bands. Chromosomal preparations obtained from an in vitro blood lymphocyte culture were RBG- and CBG-stained. The structures of nine and fourteen pairs of chromosomes were examined based on R bands and C bands, respectively. Ideograms of banded patterns of the analysed chromosomes were drawn. The sizes of individual constitutive heterochromatin blocks wereas measured. The morphology of the analysed chromosomes was assessed.
6

The structure of the synaptonemal complexes in meiocytes of European domestic goose (Anser anser)

81%
Andraszek K., Smalec E., Czyzewska D.
Folia Biologica
|
2008
|
vol. 56
|
issue 3-4
139-147
EN
The synaptonemal complex (SC) is a protein structure which binds two homologues during rophase of the firstmeiotic division and assures the correct course of genetic recombination. The demonstration and identification of SCs in European domestic goose Anser anser was the aim of the current research. Standard techniques of SC identification do not allow for an analysis of their molecular structure. In meiotic cells of one-day-old nestlings and 17-week-old geese the haploid number of bivalents, darkly stained kinetochores and subtelomeric regions may be evidence for the presence of SCs. Experimental chromosome staining with the DAPI fluorochrome permitted the observation of the characteristic ladder-like structure of SCs and the course of synapsis formation within homologues from early leptotene to their degradation in late pachytene. The detailed molecular structure of synaptonemal complexes can be analysed with an electron or scanning microscope only. Because the bivalent is a direct result of the complex.s presence, in the literature the presence of bivalents is equivalent to the term.synaptonemal complex.. However, the bivalent and the SC are two different structures.
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