FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.
The initial stages of mesoderm spreading during mesoderm morphogenesis are normal in mutant embryos.
Migration of ganglionic tracheal branches is normal in mbcunspecified mutant embryos.
The Malpighian tubules are abnormally arranged in mutant embryos.
Muscle fusion does not occur in mbcunspecified embryos.