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Dissection and Staining of Drosophila Larval Ovaries
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Dissection and Staining of Drosophila Larval Ovaries

Published on: May 13, 2011

Systems-level questions in Drosophila oogenesis

N Yakoby1, C A Bristow, I Gouzman

  • 1Lewis-Sigler Institute for Integrative Genomics and Department of Chemical Engineering, Princeton University, USA.

Systems Biology
|September 22, 2006
PubMed

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In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
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Oogenesis,  the process of developing egg cells (female gametes), occurs within the ovaries and is fundamental to female fertility. This sequence begins during fetal development when diploid oogonia in the developing ovaries undergo mitotic divisions to produce primary oocytes. By birth, these primary oocytes enter prophase I of meiosis but become arrested in this stage, remaining suspended until puberty.
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...