Fig. 5.

Ubx RNAi causes a partial homeotic transformation of T3-legs to T2-legs. Microvelia forelegs bear one sex comb (black arrow in A) and one grooming comb (green arrow in A), the T2-legs bear a single grooming comb (green arrow in B), and the T3-legs do not have any combs (C). T3-legs however bear additional thick bristles (white arrowheads in C) and a characteristic forked bristle (red arrowhead in C). Ubx RNAi does not affect the combs either in the T1-legs (D) or in the T2-legs (E). T3-legs in Ubx RNAi treatment now develop an ectopic comb (green arrow in F), lose the thick bristles, but retain their characteristic forked bristle (red arrowhead in F).