Polytene chromosomes normal.
abnormal behavior
lethal | recessive
lethal - all die before end of pupal stage | recessive
some die during pupal stage | recessive
Homozygous or forlsR172/fors larvae have a "sitter" phenotype. forlsR172/forR larvae have a "rover" phenotype. Homozygotes die after the grey wing stage of pupal development.