leptotene


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leptotene

[′lep·tə‚tēn]
(cell and molecular biology)
The first stage of meiotic prophase, when the chromosomes appear as thin threads having well-defined chromomeres.
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The movement of preleptotene/ leptotene spermatocytes across the blood-testis barrier (BTB), also known as the Sertoli cell barrier, during the seminiferous epithelial cycle is one of the most important cellular events taking place in the mammalian testis.
4: Effects of CBZ, IPR and CCK on the chronology of meiosis Primary spermatocytes stained with an anti-SCP3 antibody were selected to evaluate the respective percentages of leptotene, zygotene, pachytene and diplotene stages of the meiotic prophase.
Similar results were found in both species, briefly: [gamma]-H2AX domains appeared by late leptotene as massive accumulations at the spermatocyte nucleus, where the synapsis of autosomes begins.
Results: The frequencies of leptotene and zygotene stages were significantly higher in patients (7.
With SCP3, which visualizes the axial elements and the lateral elements of the SC, we evaluated the respective frequencies of the three leptotene, zygotene and pachytene stages in patients and controls, and assessed the frequencies of the main types of meiotic abnormalities observed at the pachytene stage.
Leptotene The early stage of meiosis during which the chromosomes shorten and appear as long, separated filaments.
The primary spermatocyte consists of 5 stages: leptotene (LSc), zygotene (ZSc), pachytene (PSc), diplotene (DSc) and metaphase (MSc) (Figs.