1B2;h26-h32
1B2;20
ac << bk1 << bb << bk2
Krivshenko and Cooper, 1953.
deletion of most of X euchromatin
Length at mitotic metaphase (relative to length of 4th chromosome): 1.1 Frequency (%) of Dp/Y segregation among female progeny: 51.9 +- 3.95 (not significantly different from 50%) Frequency (%) of exceptional (XXY) females among the progeny: 1.8
Induce 4th chromosome nondisjunction.
Ref: Grell, 1964, Genetics 50: 151--166, Grell, 1964, Proc. natn. Acad. Sci. USA. 52: 226--232.
Limits of break 1 from polytene analysis (FBrf0055832) Left limit of break 2 from inclusion of bb (citation unavailable) Right limit of break 2 from polytene analysis (FBrf0055832)