UAS regulatory sequences drive expression of a short inverted repeat.
Females heterozygous for frayHMJ02228 and Scer\GAL4mat.αTub67C.T:Hsim\VP16 crossed to frayHMJ02228 males results in: 8% hatching; egg/embryonic phenotype: "all brown, segmentation defects, U-shaped, variable"; maternal effect.