Breaks in first intron of elB.
visible | recessive
alula & macrochaeta
wing | posterior
wing vein L5
Class i allele.
Hemizygotes are almost wild-type, but have a reduction in the number of marginal bristles on the alulae and along the posterior wing margin. Wing vein L5 is sometimes shortened.
elB7 is an enhancer of chaeta phenotype of nocSco
Shows slight but real enhancement of "Sco" alleles.