Pick wild-type GFP+ to maintain. Heterozygotes are WT with relatively dim pharyngeal GFP signal, and segregate WT dim GFP+ (heterozygotes), Dpy bright GFP+ (mIn1 homozygotes), and non-GFP fbf-1 fbf-2 homozygotes (sterile). Pick WT dim GFP and check for correct segregation of progeny to maintain. q1250 is an engineered Y477A point mutation in FBF-1 derived by modification of parental strain JK3101.