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Cytogenetic Characterization of Brown Howler Monkeys, Alouatta guariba clamitans (Atelidae, Platyrrhini): Meiotic Confirmation of an X1X1X2X2X3X3/X1X2X3Y1Y2 Sex Chromosome System
(Karger, 2017-06)
For brown howler monkeys (Alouatta guariba clamitans), diploid chromosome numbers varying from 2n = 45 to 2n = 52, with XX/XY, X1X1X2X2/X1X2Y, and X1X1X2X2X3X3/X1X2X3Y1Y2 sex chromosome systems have been described by mitotic ...
Sexual diploid and apomictic tetraploid races in Thrasya petrosa (Gramineae)
(Csiro Publishing, 2005-12)
Thrasya petrosa (Trin.) Chase is the most widespread species of a grass genus indigenous to the New World. Genetic systems in diploid (2n = 2x = 20) and tetraploid (2n = 4x = 40) races of T. petrosa were investigated. The ...
Synaptic configuration of quadrivalents and their association with the XY bivalent in spermatocytes of Robertsonian heterozygotes of Mus domesticus
(2017)
BACKGROUND: The nuclear architecture of meiotic prophase spermatocytes is based on higher-order patterns of spatial associations among chromosomal domains and consequently is prone to modification by chromosomal rearrangements. ...
A plant-specific TGS1 homolog influences gametophyte development in sexual tetraploid Paspalum notatum ovules
(Frontiers Media, 2019-11)
Aposporous apomictic plants form clonal maternal seeds by inducing the emergence of non-reduced (2n) embryo sacs in the ovulenucellus and the development of embryos by parthenogenesis. In previous work, we reported a ...
Sex-Linked Chromosome Heterozygosity in Males of Tityus confluens (Buthidae): A Clue about the Presence of Sex Chromosomes in Scorpions
(Public Library of Science, 2016-10)
Scorpions of the genus Tityus show holokinetic chromosomes, achiasmatic male meiosis and an absence of heteromorphic sex chromosomes, like all Buthidae. In this work, we analysed the meiotic behaviour and chromosome ...
A comparative study of the recombination pattern in three species of Platyrrhini monkeys (primates)
(Springer, 2011-10)
Homologous chromosomes exchange genetic information through recombination during meiotic synapsis, a process that increases genetic diversity and is fundamental to sexual reproduction. Meiotic studies in mammalian species ...
Genes de recombinação envolvidos no reparo do DNA e na reprodução sexuada de Trypanosoma cruzi
(Universidade Federal de Minas GeraisBrasilICB - INSTITUTO DE CIÊNCIAS BIOLOGICASPrograma de Pós-Graduação em GenéticaUFMG, 2022-04-19)
Trypanosoma cruzi, the model organism studied in this work, has a high intraspecific
genetic diversity which reflects on its phenotypic plasticity found in different hosts. The
existence of naturally hybrid cells and the ...
Estudo do processo espermatogênico nos morcegos hematófagos Desmodus rotundus e Diphylla ecaudata (Chiroptera: Phyllostomidae)
(BrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM BIOLOGIA ESTRUTURAL E FUNCIONAL, 2018-06-11)
The vampire bats are the only mammals that feeds exclusively on the blood of mammals or
birds. Due to this peculiarity, and your relationship with the transmission of the rabies viruses,
they arouse great curiosities, ...
CYTOGENETICS OF CAESALPINIOIDEAE – LEGUMINOSAE TREE SPECIES FROM SOUTHERN BRAZILCitogenética de espécies arbóreas da subfamília Caesalpinioideae – Leguminosae do sul do Brasil.
(Universidade Federal de Santa Maria, 2005)
Astylus variegatus (Coleoptera, Melyridae): Cytogenetic study of a population exposed to agrochemical products
(Sociedade Brasileira de Genética, 2007-01-01)
In this work we describe the cytogenetic analyses performed in specimens of Astylus variegatus (Germar, 1824) collected in two localities: one area of natural vegetation and one of agricultural crops, where agrochemical ...