slmb²⁶ somatic clones induced during first and second larval instar stages, wing duplications occur very rarely, whilst legs frequently exhibit bifurcations. In addition ectopic legs exhibiting anterior and posterior structures are observed. slmb²⁶ somatic clones induced during the third larval instar stage cause wing phenotypes consisting of ectopic veins, wing margin bristles and small outgrowths affecting only one of the wing blade surfaces. Ectopic bristles look like anterior margin bristles when located anteriorly and posterior ones when located posteriorly. However by adulthood there are no clones of slmb²⁶ cells present. When clones are examined in the leg disc, they are often spherical in shape, however 72 hours after clone induction no slmb²⁶ cells remain. The clones are associated with apoptosis 12 hours post induction and 48hrs later by sorting-out of the slmb²⁶ cells.