Fig. 1. tna mutant phenotypes mimic homeotic loss-of-function phenotypes. In all panels wild type is on the left and the mutant is on the right (A) The held-out wings phenotype of a tna¹/brm² double heterozygote indicative of loss of Antp P2 function. (B) The partial transformation of haltere to wing in a tna¹/tna⁴ mutant fly indicative of loss of Ubx function. (C) The reduction in the number of sex comb teeth on the first leg of a tna²/tna⁴ mutant male indicative of loss of Scr function.