Figure 3. Analysis of fluorescence in the anterior wing margin of the adult fly at 5 days after emergence from the pupa (mitotic recombination was induced at an early pupal stage).

(1,2) Representative images of wings at 1 day after emergence for comparison. Labeled sensilla in the external branch (fork) of the wing margin and a strongly labeled axonal bundle in the proximal wing are present. Grape-like groups of cell attached to the bundle of axons, suggest recent neuronal differentiation events. (3,4) 5 day old wings. The absence of labeled cell bodies and clusters but a strongly fluorescent axonal bundle is observed. (5–8) “Mistakes” in the pattern of fluorescence in 5 day old wings. Bundles of axons along the anterior wing margin and the absence of labeled cell bodies are observed. (5,6) Hairpin-like axonal bundle. (6,7) “Errors” in the axonal bundle showing zigzag path-finding at the proximal part of the anterior wing margin. See photo 6 in figure 1 for dimensions and orientation.