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)BSC348 was generated from C(1;Y)N12, In(1)BSC34 by a large internal deletion. The proximal deletion breakpoint fell in X:21443126--21858117 (20A3--20C1, Release 5). Consequently, euchromatic genes from the base of the X are present on Dp(1;Y)BSC348