abdomen & macrochaeta | somatic clone
Group I mutant phenotype in clones: Cell lethal. Almost all cells and structures embraced within the mutant territory are missing. The mutant phenotype is restricted to the cells within the clone. A small fraction of mutant cells within the clone survive and appear normal.
Lethal phase is during the second larval instar stage. Clones in the wing and abdomen invaginate producing no hairs or bristles.