amorphic allele - molecular evidence
Mobilization of the progenitor resulting in an imprecise excision that causes a frameshift in the second exon, leading to an early stop codon.
abnormal DNA repair (with SMC57)
SMC57/SMC519 mutants exhibit significant genome instability in larval neuroblasts (in the absence of ionizing radiation), including aneuploidy, chromosome fusions and changes in the number of satellites.