title: Chemical selection for beta-galactosidase activity in Drosophila melanogaster.
mesh_terms: D000818:Animals; D002874:Chromosome Mapping; D004331:Drosophila melanogaster / Q000201:enzymology / Q000235:genetics*; D005696:Galactosidases / Q000235:genetics*; D007785:Lactose / Q000378:metabolism; D012641:Selection, Genetic; D001616:beta-Galactosidase / Q000235:genetics*
chemical_list: D005696:Galactosidases; D001616:beta-Galactosidase; D007785:Lactose