**Abbreviations**

CPT, Camptothecin; GSC, germline stem cell; Bam, bag of marbles; CycA, cyclin A; top1, topoisomerase I; CB, cystoblast; TF, terminal filament; Cpc, cap cell; ECs, escort cells; Dpp, Decapentaplegic; Hh, Hedgehog; Upd, Unpaired; En, Engrailed; Arm, armadillo; CycB, cyclin B; CycE, cyclin E; PFA, paraformaldehyde; TUNEL, Terminal deoxynucleotidyl transferase-mediated dUTP Nick End Labeling.

### **References**


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