Salivary chromosomes apparently normal, but there is occasional indication of deficiency for faint bands 16A5 and 6.
E(B) heterozygous with any B allele, including B+, produces flies similar in phenotype to homozygotes for that allele. B +/+ E(B) eyes have 80-90 facets, but B E(B)/++ eyes have only 40. Homozygous lethal. RK2(A). Reduces B-fu crossing over about 40%.
E(Bar)1 is an enhancer of phenotype of Barunspecified
Makes B eyes still narrower.