Ubxabx-1 Ubxbx-3 Ubx61d Ubxpbx-1/Df(3R)P2 mutants show transformation of T3 into T2 resulting in the replacement of halteres with a second set of wings. The homeotically transformed T3 segment resembles T2 in size. The homeotically transformed T3 segment can contain homeotic DVM-I, DVM-II, DVM-III, DLM and DFM muscles.
In Ubx61d/Ubxbxd-100 larvae A1 is transformed to T3, and a pair of incomplete presumptive leg neuromeres is formed in this transformed segment. In Ubx9.22/Ubxbxd-100 adults the commissures of the CNS in parasegment 6 are partially transformed to resemble those of parasegment 5.
H. Gloor, April 1961.
Gloor, 1961.