Abstract
Ten eye-color mutants (ge and its allele ge2, ocra and its allele ocrac, w57, do, car, cm, rb and bu) of the housefly, Musca domestlca L., were studied for tryptophan metabolism. Biochemically, it was likely that ge and ocra mutants of the housefly are homologous to the v and en mutants of Drosophila melanogaster, respectively.