Its oocytes are polarized by bicoid and other maternal-effect genes, thus establishing an antero-posterior axis.
This organism was the subject of a 1971 paper showing that genes could directly influence behavior via circadian cycles. Its oocytes are polarized by bicoid and other maternal-effect genes, thus establishing an antero-posterior axis. The discovery of distal-less and other highly-conserved Hox genes in this organism showed that segmentation was controlled by homeotic genes. In his experiments with these organisms, Thomas Hunt Morgan proposed the crossing-over mechanism and also demonstrated the existence of sex-linked genes by showing that only male ones could be white-eyed. For 10 points, name this short-lived arthropod, a common model organism in genetic studies.
This organism was the subject of a 1971 paper showing that genes could directly influence behavior via circadian cycles.
Drosophila melanogaster [or D. melanogaster; or the common fruit fly]