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
Kinetochore-independent chromosome poleward movement during anaphase of meiosis II in mouse eggs. [PDF]
PLoS ONE, 2009 Kinetochores are considered to be the key structures that physically connect spindle microtubules to the chromosomes and play an important role in chromosome segregation during mitosis.
Manqi Deng +3 more
doaj +1 more source
Post-Meiotic Intra-Testicular Sperm Senescence in a Wild Vertebrate [PDF]
, 2012 There is growing interest in sperm senescence, both in its underlying mechanisms and evolutionary consequences, because it can impact the evolution of numerous life history traits. Previous studies have documented various types of sperm senescence, but
Hettyey, Attila +4 more
core +2 more sources
Acta Agronómica, 2008 Conocer aspectos básicos de la citogenética de las papayas de montaña o papayuelas, especies del género Vasconcellea (Caricaceae) originarias de Ecuador y Colombia, fue el objetivo del trabajo.
Creucí Maria Caetano +4 more
doaj
Perturbing Microtubule Integrity Blocks AMP-Activated Protein Kinase-Induced Meiotic Resumption in Cultured Mouse Oocytes [PDF]
, 2012 The oocyte meiotic spindle is comprised of microtubules (MT) that bind chromatin and regulate both metaphase plate formation and karyokinesis during meiotic maturation; however, little information is known about their role in meiosis reinitiation.
Downs, Stephen, Ya, Ru
core +2 more sources
Variation of microsporogenesis in sexual, apomictic and recombinant plants of Poa pratensis L
Caryologia, 2022 Apomixis is a rather widespread phenomenon in plants. It is defined as the asexual formation of a seed from the maternal tissues of the ovule, avoiding the processes of meiosis and fertilization.
Egizia Falistocco +5 more
doaj
Duplicated membrane estrogen receptors in the European sea bass (Dicentrarchus labrax): Phylogeny, expression and regulation throughout the reproductive cycle [PDF]
, 2018 The numerous estrogen functions reported across vertebrates have been classically explained by their binding to specific transcription factors, the nuclear estrogen receptors (ERs).
Alvarado, M. Victoria +5 more
core +1 more source
, 2016 Prions are infectious protein polymers that have been found to cause fatal diseases in mammals. Prions have also been identified in fungi (yeast and filamentous fungi), where they behave as cytoplasmic non-Mendelian genetic elements.
Aguzzi +122 more
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CaryologiaThe present study reports the chromosome number, meiotic behavior and its relation with pollen fertility and seed set of Arnebia euchroma (Royle ex Benth.) I.M.Johnst. The species shows a chromosome count of 2n = 2x = 14.
Irfan Iqbal Sofi +4 more
doaj +1 more source
Meiotic Behavior of Wild, Synthetic and Cultivated Wheats
CYTOLOGIA, 2010 Wild relatives of bread wheat are potential sources of valuable genetic materials for wheat improvement. Genomic relationship and cross-ability between plant species can be deduced from chromosomal structure, size and behavior during meiotic division.
Mahbube Arabbeigi +2 more
openaire +2 more sources