Homozygous stai^rdtp mutant larvae exhibit a posterior paralysis "tail flip" phenotype. When they crawl along the surface of a substrate they exhibit a crawling behaviour in which the posterior body segments sharply flip upward after each peristaltic wave of muscle contraction during the crawling cycle.

stai^rdtp/stai^B200 mutant larvae exhibit a posterior paralysis "tail flip" phenotype. When they crawl along the surface of a substrate they exhibit a crawling behaviour in which the posterior body segments sharply flip upward after each peristaltic wave of muscle contraction during the crawling cycle.

Homozygous stai^rdtp mutant larvae are inviable past the third instar larvae stage. No adult progeny are recovered.

A significant number of viable adults are observed in stai^rdtp/Df(2L)Exel6015 mutants.

A bang-sensitive phenotype is seen in stai^rdtp/+ adults. The bang-sensitive phenotype is first observed in stai^rdtp/+ mutant flies at 42 days, with 25% of flies exhibiting the phenotype with mean recovery time of 56 seconds. By 56 days this increases to 58% with an increase in the recovery period to 85.6 seconds.

rdtp⁵ is homozygous lethal and exhibits a dominant "tail-flipping" phenotype.