Fig. 6. Enhancement of tra-2(mx) by removal of one copy of tra-1. The percentage of females among XX animals of genotype tra-2(mx)/+ is compared with the percentage of females among XX animals of genotype tra-2(mx)/+; tra-1(0)/+. Each column represents results from at least three matings. The experiments compared were performed in the same incubator and in the same box of plates. For tra-2(e1939mx)/+, 13 ± 1% females were observed (n = 100) and for tra-2(e1939mx)/+; tra-1(0)/+, 20 ± 2% females were found (n = 175). For tra-2(q179)/+, 1.5 ± 0.4% females were observed (n = 486), and for tra-2(q179mx)/+; tra-1(0)/+, 11 ± 3.5% females were found (n = 303). For tra-2(e1940mx)/+, 31 ± 4% females were observed (n = 100) and for tra-2(e1940mx)/+; tra-1(0)/+, 47 ± 3% females were found (n = 104).