Non-Disjunction of the Meiotic Chromosomes in <i>Rhoeo discolor</i> Hance
نویسندگان
چکیده
منابع مشابه
Meiotic non-disjunction mechanisms in human fertile males.
BACKGROUND In humans, little is known about the mechanisms of non-disjunction working in male meiosis, although considerable attention has been given to these mechanisms in female meiosis. The present study explores the origin of meiotic non-disjunction during human spermatogenesis and the chromosomes most commonly involved in this process. METHODS We used Multiplex fluorescence in situ hybri...
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It has been proposed but never proven that cohesion between sister chromatids distal to chiasmata is responsible for holding homologous chromosomes together while spindles attempt to pull them toward opposite poles during metaphase of meiosis I. Meanwhile, the mechanism by which disjunction of homologs is triggered at the onset of anaphase I has remained a complete mystery. In yeast, cohesion b...
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چکیده ندارد.
15 صفحه اولThe Strandedness of Meiotic Chromosomes from Oncopeltus
Meiotic chromosomes were isolated from male Oncopeltus fasciatus by dissecting the testes under insect Ringer's solution and spreading the living cells on the Langmuir trough. After being dried by the critical point method, preparations were examined under the electron microscope. Chromosomes at all stages of prophase prove to be multistranded. A significant increase in the number of parallel 2...
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The typical behavior of chromosomes in meiosis is that homologous pairs synapse, recombine, and then separate at anaphase I. At anaphase II, sister chromatids separate. However, studies of small chromosomes in maize derived from a variety of sources typically have failure of sister chromatid cohesion at anaphase I. This failure occurs whether there is pairing of two copies of a minichromosome o...
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ژورنال
عنوان ژورنال: The Japanese Journal of Genetics
سال: 1937
ISSN: 0021-504X,1880-5787
DOI: 10.1266/jjg.13.31