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Fig. 2. MB mitotic clones induced in Drosophila early first instar
larvae. In a heterozygous (lio2/+) genetic background,
lio2/lio2 MB clones display wild-type
morphology (compare A with B), meaning that the defects observed
in the lio2/lio2 genetic background are
non-cell-autonomous. In a lio2/drlR343 genetic
background (C), labeling of a single MB neuroblast lineage reveals that
the mutant axons, once having crossed the midline, follow the contralateral
ß lobe (arrow). The dashed line indicates the midline. The genotype is
GAL-C155, hs-FLP, UAS-mCD8-GFP; tubP-GAL80 FRT40A/FRT40A in A,
GAL-C155, hs-FLP, UAS-mCD8-GFP; tubP-GAL80 FRT40A/lio2
FRT40A in B and GAL-C155, hs-FLP, UAS-mCD8-GFP; tubP-GAL80
drlR343 FRT40A/lio2 FRT40A in C. Scale bars: 50
µm.