After generating all the Dp(1;Y)BSC chromosomes as described in FBrf0212582, we calculated the minimal euchromatic coverage of the X chromosome provided by these duplications as 97.0%.
Series of Dp(1;Y) stocks carrying segments of the X chromosome on the tip of Y chromosome; in an isogenic background. At the time of publication (FBrf0212582), the Dp(1;Y) collection provided a minimum of 78% coverage with duplication breakpoints spaced a median of nine genes apart.
This is 1Lt, not an induced breakpoint.
Dp(1;Y)BSC120 was generated from C(1;Y)N12, In(1)BSC26 by a large internal deletion. The proximal deletion breakpoint fell in X:21189930--21253567 (19F4--20A1, Release 5). Consequently, euchromatic genes from the base of the X are present on Dp(1;Y)BSC120
Dp(1;Y)BSC120 carries five regions from the X chromosome. Three segments are appended to YS: a distal X segment (1Lt;1B5, X:1Lt ;387562 (R5)), a medial X segment (11B1-11B7;11D1, X:12477049..12534787 ;12797208) and a basal X segment that extends distally from a point in centric heterochromatin distal to bb to a point either in X heterochromatin or in basal euchromatin. An X segment extending proximal from a point between fog and stnA ( X:22228492..22384175 ) to an unknown point in X heterochromatin and a small X segment from 16A carrying B[S] are appended to YL.