bk1 hits mam << bk2
50C breakpoint between coordinates -27.3 and -25.5 in the region of mam (Yedvobnick, Smoller, Young and Mills, 1988).
Proximal breakpoint molecularly mapped.
Limits of break 1 from complementation mapping against mam (FBrf0045941) Limits of break 2 from polytene analysis (FBrf0029349)
Crossing over in 2R reduced to about 13%.
Ives. 17th Dec. 1941.
Isolation: New Mexico, USA.