Polytene chromosomes normal.
Heterozygous and homozygous third instar larvae have melanotic nodules found in the hemocoel. In heterozygous larvae, the melanotic nodules are surrounded by lamellocytes.
Strong blood tumour phenotype.
l(3)mbnE1/l(3)mbn[+] is an enhancer of wing margin phenotype of Bx2
l(3)mbnE1/l(3)mbn[+] is a suppressor of scutellar bristle | increased number phenotype of Chie5.5
l(3)mbnE1/l(3)mbn[+] is a suppressor of scutellar bristle | increased number phenotype of SsdpL7