UAS regulatory sequences drive expression of a short inverted repeat.
Females heterozygous for cswHMS00012 and MTD-Gal4 (consists of Scer\GAL4otu.T:Hsim\VP16, Scer\GAL4nos.PG and Scer\GAL4nos.UTR.T:Hsim\VP16) crossed to cswHMS00012 males results in: 27% hatching; egg/embryonic phenotype: weak corkscrew phenotype; maternal effect.