stwl02024/stwl02024 mutant ovaries in 1 day old adults display poorly developing fusomes, with absence of branched fusomes, and the germaria display an excess of spherical spectrosomes and a reduction in the number of spectrosomes.
Females lay few eggs and ovaries remain rudimentary.
Δ2-3 induced mobilisation of the P{PZ} element demonstrates the insertion is responsible for the female sterile phenotype.