Personal communication from: Dan Lindsley, University of California, San Diego To: Bloomington Drosophila Stock Center Subject: Aberrations in the Mid-America Stock List Background: We asked Dan if he could identify any of the aberrations from the Mid-America stock list that weren't in FlyBase or provide any additional information on some that were in FlyBase. Information he provided that is relevant to FlyBase follows. Information communicated: 1. C(1;Y)112-17 & C(1;Y)129-11 "C(1;Y)112-17 & 129-11 are XYL.YS with the X in normal sequence: Like C(1;Y)6 I suppose." 2. C(1;Y)110-8 & C(1;Y)115-9 "C(1;Y)110-8 & 115-9 are XYS.YL with the X in normal sequence: Like C(1;Y)8?" 3. Dp(1;1)L "These are derivatives of a normal X with heterochromatin appended to the tip without the loss of any vital loci. One carries BS from the BSY, one carries y31d from In(1)sc8, and one carries y+ from y+Y. They were made by me and used in the construction of Dp(1;1)BSTAG, which apparently no longer exists." 4. Dp(1;3)scJ4 "Dp(1;3)scJ4 is a useful chromosome; it carries y+ appended to the end of 3L without the loss of any vital third chromosome loci. Useful in somatic mosaics as an alternative to mwh+." 5. Dp(1;Y)BSv+y+ "Dp(1;Y)BSv+y+ is the only Y carrying a normal allele of v."