Chromosoma
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Experimentelle Untersuchungen über die Wirkung von Meterwellen verschiedener Feldstärke auf das Teilungswachstum der Pflanzen
Chromosoma - Tập 3 - Trang 483-509 - 1950
Microtubule disorientation in anaphase half-spindles during autosome segregation in crane fly spermatocytes
Chromosoma - Tập 76 - Trang 309-328 - 1980
The region between the kinetochores of syntelically oriented autosomes and the pole in meta- and anaphase of Pales ferruginea spermatocytes was studied by means of serial sections. Microtubule (MT) were counted and measured, and the spindle region was reconstructed by superimposition of successive micrographs. Kinetochoric (kMTs) and non-kinetochoric microtubules (nkMTs) interdigitate with one ano...... hiện toàn bộ
Electron microscopy of surface spread polytene chromosomes of Drosophila and Stylonychia
Chromosoma - Tập 89 - Trang 107-110 - 1984
The ultrastructure of polytene chromosomes of Drosophila and Stylonychia were compared in whole-mount spread preparations. In Drosophila the chromomeres appear as dense, unresolvable structures interconnected by 10-nm interband fibers. In contrast, chromomeres of Stylonychia polytene chromosomes are formed by aggregates of 30-nm loops laterally attached to 10-nm interband fibers. It is suggested t...... hiện toàn bộ
Die Cytologie des pädogenetischen Entwicklungszyklus der Gallmücke Oligarces paradoxus Mein
Chromosoma - Tập 1 - Trang 391-473 - 1939
Es wurden die Chromosomenverhältnisse des pädogenetisch-parthenogenetischen Entwicklungszyklus der heterogonen GallmückeOligarces paradoxus Mein, untersucht. Die Äquatorialplatten der einzigen, äquationellen Reifeteilung, bei der keine Tetraden auftreten, sowie der 1., 2. und 3. Furchungsteilung bestehen aus 66 Chromosomen. Im 3. Furchungsschritt spielt sich an den drei vorderen Abkömmlingen des p...... hiện toàn bộ
Electron spectroscopic imaging analyses of the distribution of phosphorus in Balbiani ring granules and in the surrounding nucleoplasm
Chromosoma - Tập 105 - Trang 360-368 - 1997
The in situ distribution of phosphorus was studied in unstained ultrathin sections of salivary glands ofChironomus tentans andCh. thummi larvae using elemental mapping by means of an energy-filtering transmission electron microscope. This distribution was related to the structures observed using contrast enhancement with inelastically scattered electrons at 250 eV. This procedure demonstrated that...... hiện toàn bộ
Differences in the quinacrine staining of the chromosomes of a pair of sibling species: Drosophila melanogaster and Drosophila simulans
Chromosoma - Tập 34 Số 4 - Trang 424-435 - 1971
A phylogenetic study of bird karyotypes
Chromosoma - Tập 46 - Trang 91-120 - 1974
Karyotypes were compared in 48 species, including 6 subspecies, of birds from 12 orders: Casuariiformes, Rheiformes, Sphenisciformes, Pelecaniformes, Ciconiiformes, Anseriformes, Phoenicopteriformes, Gruiformes, Galliformes, Columbiformes, Falconiformes and Strigiformes. — With the exception of the family Accipitridae, all the species studied are characterized by typical bird karyotypes with sever...... hiện toàn bộ
Intranuclear fibrillar material in cereal pollen mother cells
Chromosoma - Tập 71 - Trang 289-332 - 1979
Ultrastructural studies of cereal anthers found intranuclear bundles of microfilaments in pollen mother cells (PMCs) but not elsewhere. The ultrastructure, distribution, and behaviour of this fibrillar material (FM) are described. FM was seen in all 19 genotypes studied comprising Aegilops, Triticum, Secale, Hordeum and Avena species, which together included haploid, diploid and allo-and autopolyp...... hiện toàn bộ
Further studies on pachytene pairing failure in maize
Chromosoma - Tập 13 - Trang 16-26 - 1962
Pairing failure in pachytene chromosomes was studied against a genetically constant background. Very significant negative correlations were found between total chromosome length per cell on the one hand and number of terminal pairing failures and their total extent (per cent length) on the other, and between number of terminal failures and their average extent (per cent length). No significant cor...... hiện toàn bộ
Tổng số: 3,525
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