Expression of dlA and dlD in hair cells in anterior maculae. Lateral views of utricular maculae at 30 h showing expression of dlA (A-D) or dlD (E-H) in nascent hair cells (arrows). Wild-type embryos (A,E) usually show only one or two labeled cells at this time. noitb21/tb21 mutants (B,F) show a normal number of stained cells, but expression levels are usually lower than normal. dlAdx2/dx2 mutants (C,G) show supernumerary nascent hair cells with intense labeling, whereas dlAdx2/dx2; noitb21/tb21 double mutants (D,H) show near normal numbers of nascent hair cells with reduced labeling. In all panels, anterior is to the right and dorsal is up. Scale bar, 15 μm.
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