Herman Muller subjected these organisms to X-ray mutagenesis, creating his namesake morphs.
Antagonism between the PGC and Torso pathways in this organism separates germ cells from somatic cells. OvoD mutants of this organism are used alongside the FLP-FRT system to screen out non-recombinant germline clones in the DFS method. Enhancers for the tyrosine kinase sev in this organism include sos, which was found by enhancer-suppressor screen. The anterior-posterior axis of this organism is specified by the maternal effect genes (*) hunchback and caudal, which are inhibited via 3' UTR binding of nanos and bicoid, respectively. An important screen for factors important in the development of this organism specifically looked for lethal mutations and was performed by Eric Weischaus and Christine Nusslein-Volhard; that screen found genes like Kruppel and Engrailed. Herman Muller subjected these organisms to X-ray mutagenesis, creating his namesake morphs. For 10 points, name this organism whose mutations include bar eyes and white eyes.
Antagonism between the PGC and Torso pathways in this organism separates germ cells from somatic cells.
Drosophila melanogaster [or D. Melanogaster]