Permanency of chromosome scaffold during meiosis of grasshopperAcrida turrita
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چکیده
منابع مشابه
Initiation of homologous chromosome pairing during meiosis.
Following pre-meiotic DNA replication, homologous chromosomes must be paired and become tightly linked to ensure reductional segregation during meiosis I. Therefore initiation of homologous chromosome pairing is vital for meiosis to proceed correctly. A number of factors contribute to the initiation of homologous chromosome pairing including telomere and centromere dynamics, pairing centres, ch...
متن کاملThe Dynamics of Homologous Chromosome Pairing during Male Drosophila Meiosis
BACKGROUND Meiotic pairing is essential for the proper orientation of chromosomes at the metaphase plate and their subsequent disjunction during anaphase I. In male Drosophila melanogaster, meiosis occurs in the absence of recombination or a recognizable synaptonemal complex (SC). Due to limitations in available cytological techniques, the early stages of homologous chromosome pairing in male D...
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in the present study, the effect of e-64 at different concentrations (0.5, 1, 5 and 10 µm) added to (1) the ivm medium on oocyte nuclear maturation and developmental competence of ovine oocytes, and (2) to the ivc medium on embryonic development of ovine embryos were investigated.
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 ...
متن کاملCdc55 coordinates spindle assembly and chromosome disjunction during meiosis
During meiosis, two consecutive nuclear divisions follow a single round of deoxyribonucleic acid replication. In meiosis I, homologues are segregated, whereas in meiosis II, sister chromatids are segregated. This requires that the sequential assembly and dissolution of specialized chromosomal factors are coordinated with two rounds of spindle assembly and disassembly. How these events are coupl...
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ژورنال
عنوان ژورنال: Caryologia
سال: 1994
ISSN: 0008-7114,2165-5391
DOI: 10.1080/00087114.1994.10797283