Pka-C1X4/Pka-C1Tw2 mutant flies show an inability to find a preferred temperature, with temperature preference spread across a wide gradient.
Pka-C1B10/Pka-C1Tw2 mutant flies show an inability to find a preferred temperature, with temperature preference across a wide gradient.
Pka-C1B3/Pka-C1Tw2 females are sterile and contain multinucleate nurse cells in egg chambers beyond stage 5. Discontinuities in the actin ring at the site of the intercellular bridges are seen. Border follicle cells sometimes do not migrate or show incomplete migration in Pka-C1B3/Pka-C1Tw2, Pka-C1H2/Pka-C1Tw2 or Pka-C1H3/Pka-C1Tw2 females.
When in trans with other Pka-C1 amorphic mutations females do not lay eggs.