ac << bk1 << bb << bk2
Krivshenko and Cooper, 1953.
deletion of most of X euchromatin
Length at mitotic metaphase (relative to length of 4th chromosome): 0.5 Frequency (%) of Dp/Y segregation among female progeny: 46.7 +- 2.09 (not significantly different from 50%) Frequency (%) of exceptional (XXY) females among the progeny: 3.5
Satellite DNA carried on the chromosome is not involved in the hybrid lethality from the cross between D.melanogaster males and females of its sibling species.