A mutation in the splice donor site.
Nucleotide substitution: G?A. Mutation in the intron 4 splice donor site.
lethal | recessive
lethal - all die before end of larval stage (with Df(2L)N22-14)
some die during larval stage (with Df(2L)N22-14)
The most advanced stage seen in emb1/Df(2L)N22-14 animals is the 2nd larval instar.