In ab²⁶/Df(2L)FCK-20 embryos, the number of multidendritic sensory neurons is the same as in wild-type embryos but the number of dendritic branches is increased and the general pattern is disorganized.

ab²⁶ dbd neuron clones exhibit ectopic dendritic processes. ab²⁶ ddaE and ddaF neuron clones exhibit increased terminal dendritic branches, while other DA ab²⁶ neurons in the dorsal cluster show normal dendritic morphology. ab²⁶/+ third instar larvae show an increased number of ddaE dendritic ends compared to wild-type larvae, but this phenotype is less severe than in ab²⁶ homozygous larvae. ab²⁶/+ larvae also show an increased number of dendritic ends in vpda neurons. Detailed analysis of ab²⁶/+ the dendritic trees of vpda neurons shows that the number of primary branches are not different from wild type, while there are far fewer tertiary and quarternary branches in comparison to wild type. In second instar ab²⁶/+ larvae, there is only a 12% increase in the number of vpda dendritic ends, while there is a 39% increase in third instar larvae compared to controls.

In ab²⁶/ab¹ mutant larvae, ddaE neurons in A5 segments have 19% more dendritic branches that the wild type.