Insertion in the 3' end of O-fut1 which is predicted to result in replacement of the seven C-terminal amino acids (TNVHEEL) with four different amino acids (DEIT) followed by a stop codon.
Homozygous clones result in loss of wing tissue, thickening of the wing veins and loss of sensory bristles on the notum (including the loss of scutellar bristles).