Scer\FRT-mediated recombination between the two progenitor insertions has deleted the sequence between them, resulting in a deletion of almost the entire Ten-m gene (only the first exon is still present).
Homozygous and Ten-mCB04632/Ten-mΔ510 embryos show defects in the guidance of the intersegmental nerve in the periphery.
Ten-mΔ510 is rescued by Ten-m+t133