Chromosomal Distribution of Constitutive Heterochromatin and Nucleolus Organizer Regions in Four Dascyllus Fishes (Pomacentridae, Perciformes)
نویسندگان
چکیده
منابع مشابه
Chromosomal polymorphisms of constitutive heterochromatin and inversions in Drosophila.
A simple technique for preparing mitotic metaphases from a larval ganglion of Drosophila is described. Parallel examination of polytene and metaphase chromosome groups shows that inversion polymorphism in chromosome 3 of D. recticilia from East Maui (Hawaii) manifests a one-to-one correlation with a metaphase karyotype polymorphism due to the presence of an extra heterochromatic portion. These ...
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Three populations of the genus Crenicichla, namely Crenicichla iguassuensis, Crenicichla sp 1 and Crenicichla sp 2, from the Iguaçu River, were analyzed cytogenetically, and their nucleolus organizer regions, constitutive heterochromatin distribution and chromomycin A3 markings were studied. Karyotype analyses showed a diploid number of 48 chromosomes, made up of 2 metacentric pairs, 2 submetac...
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Banded chromosomes of a male marbled polecat, Vormela peregusna, from the Konya province in Turkey were studied. Conventional chromosome staining, Ag-NOR staining and C-banding were used to reveal the detailed morphology of the karyotype. The karyotype included eight metacentric, four submetacentric , five subtelocentric and one acrocentric autosomal pair (NFa = 70). The X chromosome was a medi...
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BACKGROUND Cells that reach "Hayflick limit" of proliferation, known as senescent cells, possess a particular type of nuclear architecture. Human senescent cells are characterized by the presence of highly condensed senescent associated heterochromatin foci (SAHF) that can be detected both by immunostaining for histone H3 three-methylated at lysine 9 (H3K9me3) and by DAPI counterstaining. MET...
متن کاملOccurrence of multiple nucleolus organizer regions and intraspecific karyotype variation in Scaptotrigona xanthotricha Moure (Hymenoptera, Meliponini).
Scaptotrigona xanthotricha has a wide geographic distribution in the Brazilian Atlantic rainforest. One population from southeast and two from northeast Brazil were analyzed and were found to have chromosome polymorphisms. Although the chromosome number 2n = 34 is conserved in this species, karyotypic analysis revealed clear differences between the three populations. Congruent and ubiquitous mu...
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ژورنال
عنوان ژورنال: CYTOLOGIA
سال: 2005
ISSN: 0011-4545,1348-7019
DOI: 10.1508/cytologia.70.345