tw << bk1 << bk2 << wap
only a weak effect on the number of chaetae in the presence of h and emc wild type alleles. In h and emc mutant homozygous flies the increase in chaetae is proportional to the doses of the achaete-scute complex.
Disjoins regularly from XY, shows 3% nondisjunction from C(1)RM and causes 18% nondisjunction of In(1)dl-49 from + in In(1)dl-49/+/Dp(1;f)3 female.
deletion of most of X euchromatin