Includes no IGS repeats.
Construct: 4.8kb segment of bb extending from the HindIII site in the 18S gene to the 5' HindIII site in the 28S gene.
Improves neither recovery of reciprocal products from Df(1)X-1/Dp(1;Y)BSYy+ males nor male fertility.
Does not alter the frequency of X-Y nondisjunction seen in Df(1)X-1/Dp(1;Y)BSYy+ males.