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Mostrando ítems 61-70 de 354
High risk cytogenetic abnormalities in patients with multiple myeloma Características citogenéticas y detección de anormalidades de alto riesgo en mieloma múltiple
(Sociedad Medica de Santiago, 2019)
Background: Cytogenetic abnormalities observed in the bone marrow of patients with multiple myeloma (MM) are an important prognostic factor for risk stratification. Aim: To investigate karyotype characteristics and frequency ...
Cytogenetic characterization of Metynnis maculatus (Teleostei; Characiformes): the description in Serrasalminae of a small B chromosome bearing inactive NOR-like sequences
(UNIV FLORENCE BOTANY INST, 2009)
Mitotic chromosomes of Metynnis maculatus (KNER 1860) (Teleostei, Characiformes), a fish species that occurs in the Amazon and Parana-Paraguay river basins, were analyzed for the first time by Giemsa and Ag-NOR staining, ...
Nucleolar chromosome variants in Sternopygus macrurus (Pisces, Sternopygidae) from three Brazilian river basins
(1993-01-01)
The karyotypes, location of nucleolus organizer regions (NOR) and constitutive heterochromatin pattern of Sternopygus macrurus (Pisces, Gymnotoidei) of natural populations from the Amazon River, Sao Francisco River and ...
Satellite dna in neotropical deer species
(2021-01-01)
The taxonomy and phylogenetics of Neotropical deer have been mostly based on morpho-logical criteria and needs a critical revision on the basis of new molecular and cytogenetic markers. In this study, we used the variation ...
Comparative cytogenetic study in Muscidae flies
(Instituto Internacional de Ecologia, 2007-12-01)
O número modal de cromossomos dos Dípteros Muscóideos é 2n = 12, incluindo cinco pares de autossomos e um par de cromossomos sexuais. No entanto, algumas espécies com 2n = 10 cromossomos já foram descritas, sendo todas ...
Chromosome polymorphism of heterochromatin and nucleolar regions in two populations of the fish Astyanax bockmanni (Teleostei: Characiformes)
(Soc Brasileira Ictiologia, 2010-10-01)
Karyotype and other chromosomal markers as revealed by C-banding and silver (Ag) impregnation in two Astyanax bockmanni populations (Barra Seca Stream and Campo Novo River) were examined. The diploid chromosome number 2n ...
Karyological characterization of four Neotropical fish species of the genus Hisonotus (Teleostei, Loricariidae, Hypoptopomatinae) from distinct Brazilian river basins
(Sociedade Brasileira de Genética, 2006-01-01)
The karyotypes of four Hisonotus species (two provisionally-named species A and D, H. nigricauda, and H. leucofrenatus) were found to have the same diploid number of 2n = 54 and interstitial silver-staining nucleolus ...
Occurrence of ZZ/ZW sex chromosomes in Thoracocharax stellatus fish (Characiformes, Gasteropelecidae) from the Araguaia River, south America
(Springer, 2008-06-01)
The karyotypic and chromosomal characteristics of the hatchetfish Thoracocharax stellatus from the Araguaia River, Brazil (Araguaia-Tocantins basin) were analyzed using Giemsa, AgNO3, and CMA(3) fluorescent staining, and ...
First description of supernumerary chromosomes in Ictalurus punctatus Rafinesque 1818 reveals active ribosomal genes in the B complement
(2016-01-01)
The North American channel catfish Ictalurus punctatus Rafinesque 1818 is cultivated in the United States, Asia and Brazilian fish farms, and also utilized as a model species in aquaculture and genetic studies. In this ...
Cytogenetic markers as a tool for characterization of hybrids of Astyanax Baird & Girard, 1854 and Hyphessobrycon Eigenmann, 1907
(Pensoft Publishers, 2020-05-27)
Astyanax Baird et Girard, 1854, is one of the largest genera in the family Characidac and comprises 177 valid species. This genus has been the focus of cytogenetic studies primarily owing to the presence of B chromosomes ...