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Fig. 7. Effects of full-length and deleted ft constructs on PCP and crossvein spacing. (A-H) Polarity of hairs in adult wings; normal polarity is indicated by blue arrows and abnormal polarity by red arrows. Crossvein spacing is reduced by all constructs. (A) Wild type; positions of the longitudinal (L1-L5) and crossveins (ACV, PCV) are marked. (B) Defects in viable ft¹⁸ mutant. (C) Defects induced by large homozygous ft^G-rv clone (y^-) in the distal region of the wing blade between L2 and L3. The clone occupies the entire region shown. (D,E) Apparent partial rescue of PCP defects of ft^G-rv/ft^fd wing with act-gal4 and UAS-ft (D) or UAS-ft ${Delta}$ ECD (E). (F-H) Proximal PCP defects induced in wild-type wing with act-gal4 and UAS-ft (F), UAS-ft ${Delta}$ ECD (G) or UAS-ft ${Delta}$ ICD (H). Defects were milder with UAS-ft ${Delta}$ ECD. (I-L) Polarity of abdominal hairs. (I) Wild type. (J) Disruption in ft^G-rv/ft^fd. (K,L) Partial rescue of ft^G-rv/ft^fd by act-gal4 and UAS-ft (K) or UAS-ft ${Delta}$ ECD (L).

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