Point mutation.
Embryonic lethal or semi-lethal when heterozygous with ph-d2. Unhatched larvae carry segmentation defects or polarity defects.
Transformation of legs 2 and 3 to leg 1.
Lack midgut constrictions.
E(Pc)unspecified, Pcl12 has visible | homeotic phenotype
Pcl12 has leg phenotype, enhanceable by Df(2R)trix
Pcl12 has sex comb phenotype, enhanceable by Df(2R)trix
Pcl12 has leg phenotype, enhanceable by Df(3L)fz-GF3b
Pcl12 has sex comb phenotype, enhanceable by Df(3L)fz-GF3b
Pcl12 has leg phenotype, enhanceable by Df(2R)CA53
Pcl12 has sex comb phenotype, enhanceable by Df(2R)CA53
E(Pc)unspecified, Pcl12 has mesothoracic segment | dorsal phenotype
The extra sex combs phenotype of Pcl12 heterozygotes is dominantly enhanced by Df(2R)trix, Df(3L)Pc, Df(2L)H20, Df(2L)TW3, Df(2R)CA53 and Df(3L)fz-GF3b.
E(Pc)unspecified/Pcl12 double homozygotes show some anterior transformation of the dorsal mesothorax, having a dorsal strip of naked cuticle.
Williams.
The anterior transformation seen in E(Pc)unspecified/Pcl12 double homozygotes depends on Scr+ activity.