10-nt deletion in 4th exon of al resulting in a frameshift. Deletion is from 2L:386 ,781-386,793. The deletion may be a single deletion or two deletions, as 3 nt of sequence aligns in multiple positions within the 13-nt interval.
Similar to al1 but weaker phenotype. Arista, scutellar bristle and scutellum phenotype similar to al1; wings more curved but not narrowed (Schultz and Curry, quoted in FBrf0006100).
Stern, Jan. 1926.
