Extended Data, Figure 1: (A) Illustration of amphid and phasmid neurons in C. elegans. Cilia are marked at the dendritic tips of these neurons. (B) Examples of the Oil lipophilic dye filling test in sensory amphid neurons of wild-type and ift-20 mutant worms. 100% of the ift-20 null worms fail to incorporate dye (N2::15). (C, D) Examples of th...