Fig. 6. Clones involving starry night (stan). (A) stan^– clones marked with pawn; inside the clones the polarity is dishevelled but there are no consistent effects on neighbouring cells outside the clone (genotype 45). (B) A stan^– clone expressing fz marked with pawn, note the dishevelled rows and orientation of hairs inside the clone but the lack of effect on polarity outside the clone (blue arrowheads, genotype 46). Compare with (C) a stan⁺ clone overexpressing fz; the clonal hairs are well-ordered but there is reversed polarity within the front and anterior to the clone (yellow arrowheads, genotype 4). (D) Part of a clone overexpressing stan marked with pawn in the pleura, note the substantial reversal at the back of the clone and behind (red arrow, genotype 50). (E) Two stan^– clones expressing Vang marked with pawn; note the disarray in the clones and the lack of reversal behind them (blue arrowheads, genotype 51). Compare with Fig. 5D. (F) Clones overexpressing stan in a fz^– background fail to repolarise behind (blue arrowheads, genotype 52).