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.