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Fig. 4. Suppression of the Uab transformation by P cytotype. UabHH1/TM1 female. The transformation of the A1 tergite is dramatic, but not as complete as in the homozygote, as shown in Fig. 2. UabHH1/Harwich female. The A1 tergite is restored to the wild-type character by the presence of the Harwich chromosomes, which confer the P cytotype.