mei-P26 mutants display ectopic Bam expression. (A,B) w1118 control (A) and mei-P26mfs1 homozygous (B) germaria stained for Nanos (Nos; green), Bam (red) and DNA (blue). In control samples, Nanos and Bam are expressed in mutually exclusive patterns. By contrast, mei-P26 mutants display overlapping Nanos and Bam expression. (C,D) mei-P26mfs1 bam (C) and mei-P26mfs1 bgcn (D) double mutants stained for Hts (green) and DNA (blue). Both double mutants form ovarian tumors that contain single cells with round fusomes. Scale bars: 10 μm.