title: Genetic studies of three sibling species of Drosophila with relationship to theories of speciation.
mesh_terms: D003433:Crosses, Genetic; D004330:Drosophila / Q000235:genetics*; D004331:Drosophila melanogaster / Q000235:genetics; D005260:Female; D005838:Genotype; D008297:Male; D013045:Species Specificity