Bimodal distribution of cilia lengths. (A) Cilia from the P7 volume were binned by 100 nm and the distribution of cilia lengths was plotted as a percentile of total cilia. (B–D) The distribution of cilia lengths plotted in A is separated by pocket (B), surface (C), and concealed (D) cilia types. Within each cilium type, the distributions are shown by cell layer with S/G2 cilia and protein-rich cilia plotted separately. There are no S/G2 cells with surface cilia and all protein-rich cilia are concealed. (E) The depth of the basal body for each cilium in the EGL is plotted based on cilium type. Cells in G1/G0 are on the left and cells in S/G2 are on the right. (F) The pocket, surface and concealed cilia in the EGL are plotted as a fraction of the total G1/G0 cells and S/G2 cells. Cells in the EGL boundary were excluded from E and F.