Deletion of sequences from 0 to 17kb (coordinates with respect to proximal end of a cloned l(2)gl region, close to the tip of 2L).
l(2)glD150/l(2)gl119 transheterozygotes show temperature-sensitive viability. The temperature-sensitive period is in the third larval stage.
Some l(2)glD150/l(2)gl119 flies are viable. The viability is affected by temperature; the temperature sensitive period is during the third larval stage.
97.3% of mutants die as larvae, 2.7% as pupae. Extreme allele: larval brain and optic lobes become enlarged and disorganised and the imaginal discs are large and clumped. Discs of mutant larvae transplanted into wild-type female abdomens form large contained tumours, whereas transplanted optic primordia from larval brains form invasive neuroblastomas, which grow rapidly, killing the host within 7-14 days. These tumours can be serially cultured in adult abdomens.
Isolated from: Dilizhan, Armenia, USSR population.