Homozygous clones induced at the late blastoderm/early gastrulation stage and then examined in the third larval instar tracheal system result in bending in the dorsal trunk.
Homozygous clones show defects in tracheal cell migration during morphogenesis of the dorsal air sac primordium; less than 40% of clones reach the distal tip of the primordium.
2L31792L3179 falls into lethal complementation group "D1".