Macrochromosomes
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Polymorphism of Sooty-fronted Spinetail (Synallaxis frontalis Aves: Furnariidae): Evidence of chromosomal rearrangements by pericentric inversion in autosomal macrochromosomes
Abstract The Passeriformes is the most diverse and cytogenetically well-known clade of birds, comprising approximately 5,000 species. The sooty-fronted spinetail (Synallaxis frontalis Aves: Furnariidae) species, which belongs to the order Passeriformes, is typically found in South America, where it is widely distributed. Polymorphisms provide genetic variabi
Genet. Mol. Biol.. Publicado em: 11/03/2019
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2. Karyological study of Amphisbaena ridleyi (Squamata, Amphisbaenidae), an endemic species of the Archipelago of Fernando de Noronha, Pernambuco, Brazil
The karyotype of Amphisbaena ridleyi, an endemic species of the archipelago of Fernando de Noronha, in State of Pernambuco, Brazil, is described after conventional staining, Ag-NOR impregnation and fluorescence in situ hybridization (FISH) with a telomeric probe. The diploid number is 46, with nine pairs of macrochromosomes (three metacentrics, four subteloc
Genetics and Molecular Biology. Publicado em: 29/01/2010
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3. Descripción cariotípica de Spheniscus magellanicus (Spheniscidae) / Karyotypical description of spheniscus magellaniscus magellanicus (spheniscidae)
En este trabajo se describe por primera vez el cariotipo y el patrón de bandas C de Spheniscus magellanicus. Se tomaron muestras de sangre periférica de tres hembras y cuatro machos en Imbé (Rio Grande do Sul, Brasil). Para la obtención de metafases mitóticas se utilizó la técnica de cultivos de linfocitos de larga duración. El número diploide fue d
Publicado em: 2010
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4. Karyotypic characterization of Hydromedusa tectifera (Testudines, Pleurodira) from the upper Iguaçu River in the Brazilian state of Paraná
We present the karyotypic characterization of 26 specimens of the side-necked turtle Hydromedusa tectifera collected in the upper Iguaçu River, Paraná state, Brazil. The turtles were cytogenetically analyzed using Giemsa staining and other banding techniques (C, G, Ag-NOR and CMA3) as well as fluorescence in situ hybridization (FISH) with a rDNA 18S probe.
Genetics and Molecular Biology. Publicado em: 2006
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5. Chromosomal banding patterns in the eyelid-less microteiid lizard radiation: The X1X1X2X2:X1X2Y sex chromosome system in Calyptommatus and the karyotypes of Psilophthalmus and Tretioscincus (Squamata, Gymnophthalmidae)
Cytogenetic studies were performed on five closely related microteiid lizards (Gymnophthalmini), three Calyptommatus species and Psilophthalmus paeminosus from the sand dunes of the middle São Francisco river in the semiarid caatinga of the Brazilian state of Bahia and Tretioscincus oriximinensis from the Brazilian Amazon region. The diploid chromosome numb
Genetics and Molecular Biology. Publicado em: 2005-12
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6. Karyotypic characterization of Ramphastidae (Piciformes, Aves)
The karyotypes of nine species of the family Ramphastidae were determined and compared with that of the toco toucan (Ramphastos toco), the only ramphastid karyotype so far reported in the literature. Differences in the morphology of the largest chromosomes allowed to identify three karyotype groups. The first group included the species R. toco, Baillonius ba
Genetics and Molecular Biology. Publicado em: 2002
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7. Comparison of the chicken and turkey genomes reveals a higher rate of nucleotide divergence on microchromosomes than macrochromosomes
A distinctive feature of the avian genome is the large heterogeneity in the size of chromosomes, which are usually classified into a small number of macrochromosomes and numerous microchromosomes. These chromosome classes show characteristic differences in a number of interrelated features that could potentially affect the rate of sequence evolution, such as
Cold Spring Harbor Laboratory Press.
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8. Chicken Microchromosomes Are Hyperacetylated, Early Replicating, and Gene Rich
The chicken karyotype consists of 39 chromosomes of which 33 are classed as microchromosomes (MICs). MICs contain about one third of genomic DNA. The majority of mapped chicken genes are assigned to macrochromosomes (MACs), but a recent study indicated that CpG islands (CGIs), which are associated with most vertebrate genes, map predominantly to MICs. The pr
Cold Spring Harbor Laboratory Press.
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9. Chromosome 1 contains the endogenous RAV-0 retrovirus sequences in chicken cells.
We have developed a structurally unique probe which can be used to determine the chromosomal location of nonreiterated genes in vertebrate organisms by the method of in situ hybridization. The probe consists of several specific RNA molecules attached by means of poly(A) . poly(BrdUrd) hybrids to 125I-labeled DNA of high molecular weight. The probe can be syn