Scer\FRT-mediated recombination between the two progenitor insertions (PBac{WH}gsb-n^f06670 and PBac{WH}lov^f06661) has resulted in a 41kb deficiency that extends between intron 3 of gsb-n and the 3'UTR of lov.

Heterozygous embryos do not show defects in the SNa axons.

Homozygous embryos show replacement of the posterior part of each segment with a mirror-image duplication of denticle belts normally found in the anterior part of each segment. This phenotype shows high penetrance and variable expressivity.