Homozygotes show 76.1% viability. Viability of transheterozygotes is as follows: D⁸⁹/D¹⁰⁷ - 71.2%, D¹⁰⁷/D¹⁷⁵ - 53.9%, D⁸⁷/D¹⁰⁷ - 12.2%, D³/D¹⁰⁷ - 14.4%.

Mutant adult brains show defects in dendritic patterns of Scer\GAL4^Mz19-expressing projection neurons (PNs) in approximately 25% of cases. In some flies, only a single glomerulus is innervated. Although it is often aberrantly shaped, the location is generally in a position consistent with DA1. In other cases, the dendrites show ectopic innervation of glomeruli that are generally adjacent to VA1d and frequently include VA1lm. The Scer\GAL4^Mz19-expressing PNs are occasionally spatially restricted within a glomerulus in contrast to wild type where they generally fill the entire glomerulus volume.

The cell bodies of Scer\GAL4^c305a-expressing local interneurons are slightly displaced to a more anterodorsal position in mutant brains.

Or47b-expressing olfactory receptor neuron (ORN) axons show aberrant ipsilateral innervation of both the VA1lm and a neighbouring glomerulus (possibly VA1d) in approximately 60% of mutant brains. Or47b- and Or88a-expressing ORN axons fail to cross the midline in more than 40% of mutant brains.