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.
Transheteroallelic combinations of αTub84B produces males that are sterile or weakly fertile. Expression of αTub85EβTub85D.PH partially rescues the defective αTub84B function in spermatogenesis: most spermatids have complete axonemes.