embryonic cycle FBdv:00007011 2009-10-01T05:57:41Z FlyBase_development_CV A cycle of nuclear division during the embryogenesis of Drosophila melanogaster. The first 13 cycles are synchronous throughout the embryo and occur their timing relative to other developmental processes is invariant. Later nuclear division cycles are asynchronous across the embryo although may be more locally synchronized. biological process mitotic cell cycle, embryonic