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Fig. 3. Temporally regulated wg expression distinguishes maxillary and
antennal differentiation programs. (Top left) A schematic representation
shows the normal temporal programs for dpp (red) and wg
(green) expression in antennal and maxillary territories. (A,B)
larval imaginal discs and adult heads harbouring mx-to-antennal
transformations (mx>a). (Bottom left) The timing of wg
mis-expression (see Materials and methods) is indicated by the striped green
lines under the time bar. Each corresponds to a line in the results table,
bottom right, indicating the effects of temporally regulated Wg mis-expression
scored on Dan expression and on the adult mx>a transformation. Antennal
discs are oriented with posterior towards the right and dorsal towards the
bottom; a and mx indicate antenna and maxillary primordia, respectively.