Animals which carry the Dup are semi-Dpy and segregate semi-Dpy and DpyUnc (animals which have lost the Dup). Animals homozygous for the Dup are slow growing, slender and transparent. This strain was generated by the Genetic Toolkit project, which should be acknowledged in any publications resulting from its use: The Genetic Toolkit is funded by the NIH National Center for Research Resources (NCRR) (USA) to Ann M. Rose, David L. Baillie, and Donald L. Riddle. Report all experimental results to Don Riddle.

Animals with the duplication are WT. Animals which have lost the duplication are Dpy and give only dead eggs.