Expression of Hsap\PAX3Scer\UAS.cGa under the control of Scer\GAL4Mhc.PW causes similar larval musculature phenotypes to those seen in Hsap\FOXO1A::Hsap\PAX7Scer\UAS.cGa, Scer\GAL4Mhc.PW animals: larval muscles are dysmorphic and myogenic tissue is seen in the CNS. However, in contrast to Hsap\FOXO1A::Hsap\PAX7Scer\UAS.cGa, these phenotypes are only seen when two copies of both Hsap\PAX3Scer\UAS.cGa and Scer\GAL4Mhc.PW are present.