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Chromosomal diversification in populations of Characidium cf. gomesi (Teleostei, Crenuchidae)
(Wiley-Blackwell Publishing, Inc, 2011-01-01)
Comparative cytogenetic studies carried out in two populations of Characidium cf. gomesi from Botucatu region, SP, Brazil, showed a similar karyotypic structure in a diploid number of 50 chromosomes, 32 metacentric and 18 ...
Increased B chromosome frequency and absence of drive in the fish Prochilodus lineatus
(1997-11-01)
The neotropical freshwater fish species Prochilodus lineatus (Pisces, Prochilodontidae) shows 2n = 54 chromosomes plus supernumerary microchromosomes ranging in number from zero to seven among different animals. The ...
Cytogenetic studies of three species of Glandulocaudinae (Pisces, Characiformes, Characidae)
(1995-01-01)
Cytogenetic studies of three species of the subfamily Glandulocaudinae showed that Mimagoniates microlepis presents 2n = 52 chromosomes (6M + 20SM + 18ST + 8A), Mimagoniates lateralis presents 2n = 52 chromosomes (6M + ...
Degeneration of the Y chromosome in evolutionary aging models
(Springer, 2005-06-01)
The Y chromosomes are genetically degenerated and do not recombine with their matching partners X. Recombination of XX pairs is pointed out as the key factor for the Y chromosome degeneration. However, there is an additional ...
Interclonal Variations in the Molecular Karyotype of Trypanosoma cruzi: Chromosome Rearrangements in a Single Cell-Derived Clone of the G Strain
(2013-05-07)
Trypanosoma cruzi comprises a pool of populations which are genetically diverse in terms of DNA content, growth and infectivity. Inter- and intra-strain karyotype heterogeneities have been reported, suggesting that chromosomal ...
High chromosome variability and the presence of multivalent associations in buthid scorpions
(2013-04-01)
In this study, we investigated the mitotic and meiotic chromosomes of 11 Buthidae scorpion species, belonging to three genera (Ananteris, Rhopalurus and Tityus), to obtain detailed knowledge regarding the mechanisms ...
Tetrasomy 15Q11-Q13 identified by fluorescence in situ hybridization in a patient with autistic disorder
(2002-06-01)
We report a female child with tetrasomy of the 15q11-q13 chromosomal region, and autistic disorder associated with mental retardation, developmental problems and behavioral disorders. Combining classical and molecular ...
Karyotype differentiation patterns in species of the subfamily Scarabaeinae (Scarabaeidae, Coleoptera)
(Pergamon-Elsevier B.V. Ltd, 2008-12-01)
The aim of this study was to describe the karyotype of species belonging to the subfamily Scarabaeinae (Coleoptera, Scarabaeidae) and to compile the conventional cytogenetic data available in the literature for this group. ...
Chromosome polymorphism in Astyanax fasciatus (Teleostei, Characidae). 2 – Chromosomal location of a satellite DNA
(Cytogenetic and Genome Research, 2018)