Columbia subject headings:
Drosophila melanogaster.
Drosophila.
Insects--Genetics.
Harvard subject headings:
Drosophila melanogaster--Genetics.
Drosophila melanogaster.
Drosophila--Genetics.
Drosophila.
Insects--Genetics
Princeton subject headings:
Drosophila melanogaster.
Drosophila.
Insects--Genetics.