Polytene chromosomes normal.
ph-d2/+ heterozygous mutant flies exhibit a higher than wild-type average number of legs with sex combs, with an average of 2.6 legs with sex combs, compared to 2.0 in wild-type, although this is not statistically significant.
Heterozygotes with Psc1 are lethal.
Hemizygous males usually have sex combs on the second and third legs, show a partial transformation of the posterior wing compartment towards the haltere and show a partial transformation of abdominal segment A4 towards A5, at both 25 and 29oC. Hemizygous males rarely show loss of the humerus and occasionally show partial transformation of abdominal segment A1 towards A2 at 25oC. At 29oC, both these phenotypes are more common. The expressivity and penetrance of these homeotic transformation phenotypes are comparable in ph-d2 and ph-d4 males.
Adults viable.
Homozygous female or hemizygous male flies sometimes show a complete loss of the callus and bristles on the humerus. The prothoracic spiracle is unaffected. The second and third legs are often partially transformed towards the first leg. This transformation is restricted to the anterior compartment, and is particularly noticeable distally, where an extra sex comb appears. Male flies show a strong transformation of wing to haltere at 29oC, and a weak transformation at 24oC. The first abdominal segment shows a partial transformation to a more posterior segment; dorsally, pigment and large bristles appear on the tergite, and ventrally, the sternite acquires bristles characteristic of the second or third abdominal segment. The fourth abdominal segment is often partially transformed to the fifth or sixth abdominal segment in males. All the homeotic transformations are enhanced at 29oC. The temperature-sensitive period (TSP) of the first abdominal segment extends through embryogenesis and the larval stages. The TSP for the wing and leg transformations occurs during the early to mid-third larval instar period. Lethal over deficiencies that uncover the locus.
ph-d2 has sex comb phenotype, enhanceable by Hsc70-4195/Hsc70-4[+]
ph-d2 has leg phenotype, enhanceable by Df(2L)esc-P2-0
ph-d2 has sex comb phenotype, enhanceable by Df(2L)esc-P2-0
ph-d2 has leg phenotype, enhanceable by Df(2L)TW201
ph-d2 has sex comb phenotype, enhanceable by Df(2L)TW201
ph-d2 has leg phenotype, enhanceable by Df(2R)CA53
ph-d2 has sex comb phenotype, enhanceable by Df(2R)CA53
ph-d2 has leg phenotype, enhanceable by Df(2R)cn83c
ph-d2 has sex comb phenotype, enhanceable by Df(2R)cn83c
ph-d2 has leg phenotype, enhanceable by Df(3L)fz-GF3b
ph-d2 has sex comb phenotype, enhanceable by Df(3L)fz-GF3b
ph-d2 has leg phenotype, enhanceable by Df(2L)prd1.7
ph-d2 has leg phenotype, enhanceable by Df(3L)fz-GS1a
ph-d2 has sex comb phenotype, enhanceable by Df(3L)fz-GS1a
ph-d2 has leg phenotype, enhanceable by Df(3L)fz-CAL5
ph-d2 has sex comb phenotype, enhanceable by Df(3L)fz-CAL5
ph-d2 has sex comb phenotype, enhanceable by Df(2L)prd1.7
ph-d2 has leg phenotype, enhanceable by Df(2L)esc10
ph-d2 has sex comb phenotype, enhanceable by Df(2L)esc10
en4, ph-d2, ph-p2 has wing vein L4 phenotype
en54, ph-d2, ph-p2 has wing vein L4 phenotype
Abd-BMcp-1, ph-d2 has abdominal segment 3 phenotype
ph-d2/Hsc70-4195 mutant flies exhibit a higher than wild-type average number of legs with sex combs, with a statistically significant average of 4.0 legs with sex combs, compared to 2.6 in ph-d2/+ heterozygotes.
The extra sex combs phenotype of ph-d2 heterozygotes is dominantly enhanced by Df(2L)esc-P2-0, Df(2L)prd1.7, Df(2L)esc10, salm1, Df(2L)H20, Df(2L)TW3, Df(2L)TW201, Df(2R)CA53, Df(2R)cn83c, Df(3L)fz-GF3b, Df(3L)fz-GS1a and Df(3L)fz-CAL5. Lethal in heterozygous combination with Df(2L)Prl.
The abdominal transformations are enhanced by Df(3R)P9, and suppressed by Dp(3;3)P5. The leg transformations are suppressed by Dp(3;3)D1, and enhanced by Df(3R)Scr. Dominant enhancer of Pc3. Interacts with esc20 and Pcl1. Semi-lethal in combination with UbxCbx-2. Escapers show complete transformation of wing to haltere and a marked reduction of the mesonotum. Lethal in combination with Abd-BUab-1. The third abdominal segment is transformed towards segment five or six in males also carrying Abd-BMcp-1. Enhances the ScrMsc, AntpB and AntpScx phenotypes. Does not interact with AntpHu.
Males are completely rescued by ph-d+tSa.
Recombinant between ph-d and ph-p regions.