chiasma
From: The Columbia Encyclopedia, Sixth Edition
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Date: 2008
chiasma : see crossing over .
Author not available, CHIASMA.,
The Columbia Encyclopedia, Sixth Edition 2008
The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press
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Effects of polymorphic Robertsonian rearrangements on the frequency and distribution of chiasmata in the water-hyacinth grasshopper, Cornops aquaticum (Orthoptera: Acrididae)
European Journal of Entomology; 1/1/2007; Colombo, Pablo C; 3929 words;
... aquaticum, Robertsonian polymorphisms, recombination, chiasma interference, chiasma distribution Abstract. The New World grasshopper ... and Uruguay. The frequency and distribution of chiasmata were analysed in five Argentinian populations ...
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Patterns of Recombination and MLH1 Foci Density Along Mouse Chromosomes: Modeling Effects of Interference and Obligate Chiasma
Genetics; 7/1/2007; Falque, M; Mercier, R; Mézard, C; de Vienne, D; Martin, O C; 8904 words;
... biological feature of "obligate chiasma" whereby in most organisms ... for crossovers on genetic maps. However, our model provides ... forms a structure called chiasma. In addition, genetic recombination ... cytological observation of chiasmata or by immunofluorescent observation ... one measures the ...
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Variability along a latitudinal gradient in the chiasma frequency and morphological characters of Dichroplus pratensis (Orthoptera: Acrididae)*
European Journal of Entomology; 1/1/2005; Bidau, Claudio J; Martí, Dardo A; 4987 words;
... words. Central-marginal distribution, chiasmata, Dichroplus, latitudinal gradient, morphological ... induce changes in number and position of chiasmata, and thus potentially affect intrachromosomal ... of latitude, were studied. We analyzed chiasma frequency in relation to variability ...
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Wireless News 11-15-2006 Chiasma Secures $44 Million in Series C Funding WIRELESS NEWS-November 15, 2006-Chiasma Secures $44 Million in Series C Funding (C)2006 10Meters - http://www.10meters.com Chiasma, a privately held company developing novel technologies for the enhanced oral delivery of ...
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Oral drug start-up Chiasma raises $44m: This is the most that an Israeli biomed co has raised this year from VC and private investors.
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Byline: Gali Weinreb Nov. 15--Israeli start-up Chiasma, which has developed a new technology for oral delivery of ... raised this year from venture capital and private investors. Chiasma was founded by CEO Guy Yachin with initial funding from Yissum ... Tel Aviv, Israel Distributed by McClatchy-Tribune Business ...
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... company this year, beating the $44 million financing round by Chiasma Inc. last week. Elron Electronic Industries Ltd. (Nasdaq: ELRN ... Tel Aviv, Israel Distributed by McClatchy-Tribune Business News. For reprints, email tmsreprints@permissionsgroup.com, call ...
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A karyotype study on the pseudoscorpion families Geogarypidae, Garypinidae and Olpiidae (Arachnida: Pseudoscorpiones)
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... karyotype, sex chromosomes, meiosis, chiasma frequency Abstract. The karyotypes of ... meiotic division of males, a high number of chiasmata were observed in some species, up to ... or diakinesis was obtained, the mean chiasma frequency was calculated per cell and ...
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B-chromosomes behaviour during meiosis of yellow-necked mouse, Apodemus flavicollis
Folia Zoologica; 1/1/2006; Banaszek, Agata; Jadwiszczak, Katarzyna A; 5093 words;
... flavicollis. On the other hand, the number of chiasmata on A-chromosomes showed increasing tendency ... number of Bs in the karyotype. As the chiasma effect is characteristic for parasitic ... flavicotlis. Second, we estimate the number of chiasmata on the A-chromosomes to check the so ...
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Chromosome-Wide Regulation of Meiotic Crossover Formation in Caenorhabditis elegans Requires Properly Assembled Chromosome Axes
Genetics; 11/1/2004; Nabeshima, Kentaro; Villeneuve, Anne M; Hillers, Kenneth J; 12936 words;
... formation of crossovers, and the consequent chiasmata, to accomplish successful segregation ... resulting in partial competence for chiasma formation. We present both genetic and ... chromosomes: crossovers lead to formation of chiasmata that hold homologs together and allow ...
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Cytogeography of three parallel Robertsonian polymorphisms in the water-hyacinth grasshopper, Cornops aquaticum (Orthoptera: Acrididae)
European Journal of Entomology; 1/1/2008; Colombo, Pablo César; 3950 words;
... equilibria. The rearrangements cause a drastic chiasma repatterning in the fusion bivalents (or trivalents) which reduces the proximal chiasma frequency. Recombination is also reduced ... a previous study (Colombo, 2007), the chiasma effects of the Robertsonian rearrangements ...
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Recombination Map of the Common Shrew, Sorex araneus (Eulipotyphla, Mammalia)
Genetics; 2/1/2008; Borodin, Pavel M; Karamysheva, Tatyana V; Belonogova, Nadezhda M; Torgasheva, Anna A; Rubtsov, Nikolai B; Searle, Jeremy B; 7957 words;
... minimum requirement of one chiasma per chromosome arm for correct ... records. The frequency of chiasmata along bivalents at diakinesis-metapha ... measuring the position of chiasmata accurately and in combining ... detailed MLH1 recombination maps for all chromosomes of a third ... To generate ...
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Molecular Assembly of Meiotic Proteins Asy1 and Zyp1 and Pairing Promiscuity in Rye (Secale cereale L.) and Its Synaptic Mutant sy10
Genetics; 11/1/2006; Mikhailova, E I; Phillips, D; Sosnikhina, S P; Lovtsyus, A V; Et al; 8122 words;
... recombine than others is 5R (5 of the 37 chiasmata), but only nonhomologously (Table 1) and ... forms a disproportionately high number of chiasmata at this stage compared with other chromosomes ... enzymes and result in its higher involvement in chiasmate and nonchiasmate associations compared with ... its ...
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Construction of a 10,000-Marker Ultradense Genetic Recombination Map of Potato: Providing a Framework for Accelerated Gene Isolation and a Genomewide Physical Map
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... This resulted in "skeleton bin maps," which can be viewed as the ... or never, suggesting strong chiasma interference. Absolute chiasma interference within a chromosome ... potatogenome.net). GENETIC linkage maps constitute a necessary prerequisite ... High-density genetic linkage maps have ...
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A critical review of concepts and methods used in classical genome analysis.
The Botanical Review; 10/1/1998; Seberg, Ole Petersen, Gitte; 26985 words;
... pachytene pairing through the formation of chiasmata, in the frequency of which species and ... bivalents, trivalents, etc.), the number of chiasmata, and the larger structural rearrangements ... chromosomes and are held together by chiasmata until first meiotic division. Chromosomal ...
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From Diploids to Allopolyploids: The Emergence of Efficient Pairing Control Genes in Plants
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... was lacking (Table 1). Similarly, the chiasma frequencies in T. aestivum Aegilops hybrids ... used the ratio of the mean number of chiasmate arm associations to the total possible ... perenne and L. temulentum that reduced chiasma frequency at MI in interspecific L. perenne ...
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