FLP-mediated recombination between the two progenitor insertions has deleted the sequence between them, removing the entire obst-A gene.
A deletion resulting from FLP-mediated recombination that removes the entire obst-A gene.
Stage 16 trachea are convoluted in mutant embryos.
Chitin accumulation in the tracheal lumen is strongly reduced in stage 16 mutant embryos (in wild-type embryos, chitin accumulates from stage 14 onwards and is degraded at stage 17).