Summary of expression of Ultrabithorax and effects of Ultrabithorax manipulation in the ventral adult-specific lineages. Circles show the relative size and position of the segmental lineages. The two halves of each circle represent the A (NotchON) and B (NotchOFF) hemilineages. Neurons in hemilineages with dashed borders die soon after their birth. (A) Summary of expression of Ubx in wild-type (WT) clones and in clones in which cell death is blocked by mutation of the dronc gene. Ubx expression typically showed a hemilineage restriction and was weak to moderate (pink) or strong (red) depending on parasegment (PS). The Ubx expression in hemilineages that normally died was revealed in dronc- clones (*). Red ? = no Ubx expression data. (B,C) The effects of loss of Ubx (Ubx-) or ectopic expression of Ubx (Ubx+) in MARCM clones. Only the lineages that were changed by a given treatment are numbered. The changes include the survival or death of hemilineages (solid versus dashed outlines) and alteration in projection patterns (Star). A1: first abdominal segment; ND: no data; PS4-6: fourth to sixth parasegments; T1-T3: first to third thoracic segments; Ubx: Ultrabithorax; WT: wild-type.