Imprecise excision of P{lacW}neros1921 generates a small deletion that removes 123bp of the nero open-reading frame.
lethal - all die before end of second instar larval stage
lethal - all die before end of second instar larval stage (with Df(3R)04661)
some die during second instar larval stage
some die during second instar larval stage (with Df(3R)04661)
nero2 mutants die as second instar (L2) larvae, whether they are homozygous or in heteroallelic combinations (with Df(3R)04661).