lethal - all die before end of larval stage | recessive
some die during larval stage | recessive
L3 larval lethal as hemizygote. No imaginal discs.
Hemizygous larvae completely lack imaginal discs and die. Individuals die as pupae when heterozygous with rl1 or rl6.
pupal lethal when heterozygous with rl1 or rl6 (Hilliker, 1976).