inversion breakpoint within gene
Heterozygotes are wild type.
In double mutant embryos, in combination with amorphic neurogenic mutations, only neural cells that do not require a particular gene of the ASC develop to a neural fate.
ato1, da9/da[+] has coeloconic sensillum of antennal segment 3 phenotype
ato1/ato[+], da9 has coeloconic sensillum of antennal segment 3 phenotype