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. Author manuscript; available in PMC: 2018 Mar 1.
Published in final edited form as: Mol Reprod Dev. 2017 Mar;84(3):200–211. doi: 10.1002/mrd.22779

Figure 1.

Figure 1

Germ cell development in the Drosophila ovary. In the adult ovary, two to three germ-line stem cells (GSCs) give rise to cytoblasts (CBs), then divide four times to form 16-cell cysts. One cell within the 16-cell cyst undergoes meiosis and differentiates into an oocyte (not shown). The level of key regulatory proteins (illustrated as high or low) changes rapidly as the germ cell passes through each stage. Bam, Bag of marbles; pMad, phosphorylated Mothers against Decapentaplegic; Sxl, Sex-lethal.