B-chromosome Effects at Meiosis in <i>Crepis capillaris</i>
نویسندگان
چکیده
منابع مشابه
Chromosome Dynamics in Meiosis
Meiosis encompasses a large number of dynamic processes. Some of them are biochemical, such as formation and repair of meiotic double-strand breaks, while others are physical in nature, such as homologous chromosome segregation in anaphase I. Plants have been used as model species in meiosis studies for over 80 years. However, the past decade brought a dramatic improvement in the understanding ...
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Faithful chromosome segregation in meiosis is essential for ploidy stability over sexual life cycles. In plants, defective chromosome segregation caused by gene mutations or other factors leads to the formation of unbalanced or unreduced gametes creating aneuploid or polyploid progeny, respectively. Accurate segregation requires the coordinated execution of conserved processes occurring through...
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Progression of meiosis has been traditionally reconstructed from microscopic images collected from fixed cells. This approach has clear shortcomings in accurately portraying the dynamics of meiotic processes. Studies conducted in recent years mostly in unicellular fungi have shown that chromosomes in meiotic prophase exhibit dynamic motility that cannot be accurately examined using fixed cell i...
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A MODEL FOR CHROMOSOME BEHAVIOR DURING MITOSIS AND MEIOSIS .................................... .. The Mitotic Cell Cycle .....................................................................•............................................ Interphase ........................................................................................................................................ . Metaphase ...
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During mitosis and meiosis sister chromatids are held together by protein complexes. This cohesion is important not only for pairwise alignment of chromosomes on the mitotic spindle but also for the generation of tension across centromeres – it counteracts the pulling force of spindle microtubules, which ensures the bipolar attachment of chromosomes. Chromosome cohesion thus enables accurate ch...
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ژورنال
عنوان ژورنال: CYTOLOGIA
سال: 1976
ISSN: 0011-4545,1348-7019
DOI: 10.1508/cytologia.41.493