Breakpoint in the 3' untranslated region of the last exon of the Ubx unit.
-110 to -103 kb; Bender, Akam, Karch, Beachy, Peifer, Spierer, Lewis, and Hogness (1983)
The mesothorax phenotype is reduced in combination with RpII215Ubl. The dominant wing phenotype is 20% penetrant, and occurs variably within the anterior compartment.
Abbott.
The Cbx mesothorax phenotype is reduced in a number of Cbx mutations in combination with RpII215Ubl. This reduction of the Cbx phenotype follows the order: UbxCbx-Hm > UbxCbx-2RM = UbxCbx-2 = UbxCbx-M1 > UbxCbx-1RM = UbxCbx-1 = UbxCbx-3 = UbxCbx-Twt.