Hemizygous flies have outspread wings and are uncoordinated. They get stuck in the food shortly after eclosion.
The "l(2)k13305" chromosome is viable in combination with Df(2L)BSC689 and Df(2L)BSC251. These two deficiencies each uncover the sequence location determined for the P{lacW}Trp1k13305 insertion. This indicates that the lethality of the chromosome is separable from the P{lacW}Trp1k13305 insertion.