Results 61 to 70 of about 2,455 (197)
Acta Scientiarum: Biological Sciences, 2008 Para avaliar a ocorrência de cinetócoros difusos em Rhynchospora (Cyperaceae), cromossomos de R. pubera foram fragmentados ou fundidos por irradiação &gama;.
André Luís Laforga Vanzela +1 more
doaj +1 more source
The significance of cytogenetics for the study of karyotype evolution and taxonomy of water bugs (Heteroptera, Belostomatidae) native to Argentina [PDF]
, 2013 Male meiosis behaviour and heterochromatin characterization of three big water bug species were studied. Belostoma dentatum (Mayr, 1863), B. elongatum Montandon, 1908 and B. gestroi Montandon, 1903 possess 2n = 26 + X1X2Y (male).
Bressa, Maria Jose +2 more
core +2 more sources
Karyotype evolution in progress: A new diploid number in Belostoma candidulum (Heteroptera: Belostomatidae) from Argentina leading to new insights into its ecology and evolution [PDF]
, 2014 A novel chromosome complement (2n = 14 = 12 + XY/XX; male/female sex chromosomes), male meiosis behaviour, heterochromatin characterization, and frequency and distribution of chiasmata are described for the first time in specimens from a natural ...
Bressa, Maria Jose +1 more
core +1 more source
BMC Genetics, 2017 Background Holocentric chromosomes occur in approximately 750 species of eukaryotes. Among them, the genus Tityus (Scorpiones, Buthidae) has a labile karyotype that shows complex multivalent associations during male meiosis. Thus, taking advantage of the
Bruno Rafael Ribeiro de Almeida +7 more
doaj +1 more source
Genomic and cytogenetic localization of the carotenoid genes in the aphid genome [PDF]
, 2016 Data published in the scientific literature suggests a possible link between chromosomal rearrangements involving autosomes 1 and 3 and the presence of red morphs in the peach-potato aphid Myzus persicae (Sulzer).
MANDRIOLI, Mauro +3 more
core +1 more source
Journal of Systematics and Evolution, EarlyView.We present the most densely sampled phylogeny of Carex section Lupulinae to date (107 specimens) and describe herein a new cryptic species for science from the southern United States, which is locally abundant and found in well‐explored and densely populated areas. Combining DNA sequences with morphometric data obtained from 299 samples, we Demonstrate
Étienne Lacroix‐Carignan +4 more
wiley +1 more source
InsectsSilkworm ovary-derived BmN4 cells rely on chromatin-induced spindle assembly to form microtubule-based square mitotic spindles that ensure accurate segregation of holocentric chromosomes during cell division.
Bing Zhang +5 more
doaj +1 more source
The Role of Satellite DNAs in Genome Architecture and Sex Chromosome Evolution in Crambidae Moths
Frontiers in Genetics, 2021 Tandem repeats are important parts of eukaryotic genomes being crucial e.g., for centromere and telomere function and chromatin modulation. In Lepidoptera, knowledge of tandem repeats is very limited despite the growing number of sequenced genomes.
Diogo C. Cabral-de-Mello +6 more
doaj +1 more source
Chromosome numbers in the Triatominae (Hemiptera-Reduviidae): a review
Memorias do Instituto Oswaldo Cruz, 1996 The chromosome numbers of 46 out of the 122 currently recognized species of Triatominae (Hemiptera, Reduviidae) are summarized. We present the number of autosomes, the sex mechanism and the first reference for each karyotype.
Francisco Panzera +6 more
doaj +1 more source
Comparative Analysis of Tandem Repeats from Hundreds of Species Reveals Unique Insights into Centromere Evolution [PDF]
, 2012 Centromeres are essential for chromosome segregation, yet their DNA sequences evolve rapidly. In most animals and plants that have been studied, centromeres contain megabase-scale arrays of tandem repeats.
Bradnam, Keith R. +16 more
core +4 more sources