DNA synthesis during male meiotic prophase in the rat
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منابع مشابه
Ovarian meiotic prophase and the fetal pituitary in the rat.
in studies on teratogenesis. Fetuses afflicted with holoprosencephaly, including varying degrees of such malformations as pituitary agenesis, cyclocephaly, cyclopia and monorhinia, can be obtained by administering triparanol or AY 9944 which inhibits cholesterol synthesis. A large number of fetuses have a minor form of holoprosencephaly, i.e. limited to isolated hypophyseal agenesis. We used th...
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Introduction It is well-established that the major portion of nuclear DNA synthesis takes place at a specific segment of interphase (S-phase) and is completed before the onset of either mitosis or meiosis (Howard et al. 1951, Taylor 1953). However, it has been shown by biochemical methods that approxi mately 0.3 per cent of the total DNA content of the cell is synthesized during meiotic prophas...
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The transcriptional activity during meiotic prophase in the mouse testis is studied with light microscopy and high-resolution autoradiographic techniques using [(3)H]uridine as a labeled precursor. In the present study, two types of RNA synthesis are detected during meiotic prophase: an extranucleolar RNA synthesis of perichromosomal localization and a nucleolar RNA synthetic activity. In some ...
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The three-dimensional morphology and distribution of human chromosomes 3 were studied in nuclei of spermatogonia and spermatocytes I from formaldehyde-fixed human testis sections. Chromosome arms, pericentromeres and telomeric regions were painted by a three-color, five-probe fluorescence in situ hybridization protocol. Light optical serial sections of premeiotic and meiotic nuclei obtained by ...
متن کاملDna-dependent Formation of the Synaptinemal Complex at Meiotic Prophase
EVALAUTION OF MICROSPOROCYTES CULTURED DURING DISCRETE PERIODS OF MEIOTIC PROPHASE IN THE PRESENCE OF DEOXYADENOSINE, AN INHIBITOR OF DNA SYNTHESIS, INDICATE THAT: (1) late leptonema or early zygonema DNA synthesis is required to initiate the formation of the synaptinemal complex; (2) DNA synthesized during late zygonema is necessary for the disjunction of the paired homologs at diplonema; and ...
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ژورنال
عنوان ژورنال: Hereditas
سال: 2009
ISSN: 0018-0661
DOI: 10.1111/j.1601-5223.1976.tb01533.x