In many cases the appearance of tip cells is normal in mutants, however some embryos have at least one tubule with two tip cells. In these cases, one cell protrudes further from the distal end of the tubule than its sibling.
E(zip)31-631-6, inscunspecified has viable phenotype
E(zip)18-518-5, inscunspecified has viable phenotype
E(zip)12-512-5, inscunspecified has viable phenotype
Double heterozygotes with E(zip)12-512-5, E(zip)18-518-5 or E(zip)31-631-6 are fully viable and have wild-type leg morphology.