gt << bk1 << tko << w << bk2 << rst
Breakpoint(s) molecularly mapped
3A3-4 (left or distal) breakpoint localized to an approximately 4-kb restriction fragment 2-6 kb to the left of the origin of a 160-kb walk in the vicinity of z (Gunaratne, Mansukhani, Lipari, Liou, Martindale and Goldberg, 1986, Proc. Nat. Acad. Sci. USA 83: 701-05)
Df(1)w-rJ1/Df(1)wm4L rst3R viable Df(1)w-rJ1/Df(1)wm4L rst3R w phenotype Df(1)w-rJ1/Df(1)wm4L rst3R females display reduced crossing over and increased nondisjunction for all pairs of homologues.
Regular product of unequal exchange between 3C1-2 (or 3) of a wa, wa2, or wrdp chromosome and the 3A or 3C-D region of a specific homologue.