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.
Mutant follicle cell clones at the poles of the egg chamber often become motile and invade the germline cluster. These clones often contain a mix of mutant and wild-type cells.
