Giant Chromosomes
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Analise de cromossomos de especies da radiação tripunctata de Drosophila / Chromosome analysis of species of the tripunctata radiation of Drosophila
Acredita-se que no gênero Drosophila, o subgênero Drosophila é procedente do subgênero Sophophora e deu origem a outros gêneros e subgêneros e, particularmente, a duas radiações: virilis-repleta e immigrans-Hirtodrosophila. Esta última teve uma origem paleotropical, onde inicialmente se diversificou e se expandiu, enviando a radiação tripunctata a
Publicado em: 2009
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2. Cytogenetic study of the giant otter Pteronura brasiliensis Zimmermann 1780 (Carnivora, Mustelidae, Lutrinae)
The giant otter, Pteronura brasiliensis Zimmermann 1780 (Carnivora, Mustelidae, Lutrinae), was widely distributed in South America but stable populations are now only found in the Pantanal and Amazon regions and the species is classified as endangered. There is only one recognized species of giant otter, although two subspecies of doubtful value have also be
Genetics and Molecular Biology. Publicado em: 2007
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3. Chromosome study of Anteaters (Myrmecophagideae, Xenarthra): a preliminary report
Anteaters belong to the Order Xenarthra / Family Myrmecophagidae and are the only members without teeth. There are three genera with four living species in the family Myrmecophagidae: Myrmecophaga tridactyla (giant anteater), Tamandua tetradactyla (southern lesser anteater), Tamandua mexicana (northern lesser anteater), and Cyclopes didactylus (silky anteate
Genetics and Molecular Biology. Publicado em: 2004
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4. Sequencing and analysis of a EST Bank from salivary glands of Rhynchosciara americana and characterization of the gene RaDup / Sequenciamento e análise de um banco de cDNA de glândulas salivares de Rhynchosciara americana e caracterização do gene RaDup
In this work EST sequencing was used as strategy to find messages related to development, metabolism and polyteny/amplification in salivary glands of Rhynchosciara americana, a dipteran (Sciaridae) that shows in this tissue giant polytene chromosomes and gene amplification tightly regulated throughout development of the larvae. A total of 8193 EST sequences
Publicado em: 2004
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5. Distinct nonrandom patterns of chromosomal deletions in giant-cell lesions of bone
Cytogenetic analyses were performed on a bone giant cell reparative granuloma (GCRG) and on three bone giant cell tumors (GCT). The present GCRG case is the second to be described cytogenetically. A modal chromosome number of 46 was observed in all samples. Clonal chromosome abnormalities were detected in all cases. The numerical alterations most frequently
Genetics and Molecular Biology. Publicado em: 2002
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6. CYTOLOGICAL DEMONSTRATION OF THE HELICAL STRUCTURE OF GIANT CHROMOSOMES
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7. Small Deficiencies and the Problem of Genetic Units in the Giant Chromosomes
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8. INCORPORATION OF H3 CYTIDINE AND H3 THYMIDINE INTO GIANT CHROMOSOMES OF DROSOPHILA DURING PUFF FORMATION
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9. A random-walk/giant-loop model for interphase chromosomes.
Fluorescence in situ hybridization data on distances between defined genomic sequences are used to construct a quantitative model for the overall geometric structure of a human chromosome. We suggest that the large-scale geometry during the G0/G1 part of the cell cycle may consist of flexible chromatin loops, averaging approximately 3 million bp, with a rand
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10. Heat-shock puff 93 D from Drosophila melanogaster: accumulation of a RNP-specific antigen associated with giant particles of possible storage function.
The monoclonal antibody P11 is directed against a 38 000 dalton protein of Drosophila melanogaster. On polytene chromosomes this protein is present in a subset of the RNA polymerase II-containing loci. Here we show by density centrifugation and enzyme-linked immunosorbent assay tests that the P11 antigen is part of nuclear ribonucleoprotein (RNP) complexes.
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11. Quantitative investigation of reproduction of gonosomal condensed chromatin during trophoblast cell polyploidization and endoreduplication in the east-european field vole Microtus rossiaemeridionalis
Simultaneous determinations of DNA content in cell nuclei and condensed chromatin bodies formed by heterochromatized regions of sex chromosomes (gonosomal chromatin bodies, GCB) have been performed in two trophoblast cell populations of the East-European field vole Microtus rossiaemeridionalis: in the proliferative population of trophoblast cells of the junc
BioMed Central.
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12. The Drosophila Salivary Gland Chromocenter Contains Highly Polytenized Subdomains of Mitotic Heterochromatin
Peri-centromeric regions of Drosophila melanogaster chromosomes appear heterochromatic in mitotic cells and become greatly underrepresented in giant polytene chromosomes, where they aggregate into a central mass called the chromocenter. We used P elements inserted at sites dispersed throughout much of the mitotic heterochromatin to analyze the fate of 31 ind