Heterozygous adults show transformations of 2nd leg to 1st leg, wing to haltere, and ventral wing margin to dorsal wing margin. Pc22
transheterozygotes survive to the pupal stage, giving pharate adults with a strong Pc
adult phenotype: there are intersegmental, wing to haltere, extra sex comb and abdominal homeotic transformations. In addition, there is partial transformation of ventral wing margin to dorsal, and posterior wing to anterior.
Transformation of anterior segments to the 8th abdominal segment. Double heterozygous adult escapers show a mild homeotic transformation.
embryos (derived from homozygous escunspecified
mothers) that are also homozygous for Pc2
show a more extreme transformation than those carrying two copies of Pc+
partial transformations of second and third legs into first legs in Pc/+ heterozygotes