File:Meiotic prophase I stages.jpg

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Mouse Meiotic Prophase I Stages

Representative immunofluorescence images showing synaptonemal complex 3 protein (Scp3) organization on nuclear spreads at different stages of meiotic prophase I made on cultured spermatogonia.

Scale bar, 10 µm.


Leptotene

  • leptotene phase, leptonema; Greek, leptotene = "thin threads"
  • the duplicated paired chromosome homologs condense.

Zygotene

  • zygotene phase, zygonema, Greek, zygotene = "paired threads"
  • homologous chromosomes become closely associated (synapsis) to form pairs of chromosomes consisting of four chromatids (tetrads).
  • the synaptonemal complex begins to form between the two sets of sister chromatids in each bivalent (the duplicated chromosome paired with its homologous duplicated chromosome).



Links: Prophase I | Meiosis | Spermatozoa Development | Mouse Development

Reference

Pellegrini M, Di Siena S, Claps G, Di Cesare S, Dolci S, Rossi P, Geremia R & Grimaldi P. (2010). Microgravity promotes differentiation and meiotic entry of postnatal mouse male germ cells. PLoS ONE , 5, e9064. PMID: 20140225 DOI.


Citation: Pellegrini M, Di Siena S, Claps G, Di Cesare S, Dolci S, et al. (2010) Microgravity Promotes Differentiation and Meiotic Entry of Postnatal Mouse Male Germ Cells. PLoS ONE 5(2): e9064. doi:10.1371/journal.pone.0009064

Copyright

© 2010 Pellegrini et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Image cropped from Figure 2. B Simulated microgravity (SM) induces meiotic entry of Kit-positive spermatogonia.



Cite this page: Hill, M.A. (2019, August 21) Embryology Meiotic prophase I stages.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Meiotic_prophase_I_stages.jpg

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© Dr Mark Hill 2019, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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