Drosophila virilis genes controlling alkaline-phosphatase and tyrosine-decarboxylase activities are assigned to chromosome 6

The linkage group of genes controlling alkaline-phosphatase (AP) and tyrosi ne-decarboxylase (TDC) activities in Drosophila virilis adults was determin ed. D. virilis strain 160, with all autosomes marked with recessive morphol ogical mutations, was used for the analysis. AP and TDC activities were sig nificantly higher in strain 160 than in strain 147. The analysis of F-2 hyb rids, which carried one chromosome (one or both homologues) of strain 147 a nd the rest of strain 160, allowed the assignment of the genes controlling AP and TDC activities in D. virilis adults to chromosome 6.