Yp1 << bk1 << l(1)75B5 << bk2 << sev
Does not cause unconditional lethality in hybrid females when heterozygous with D.simulans chromosome.
Deficient embryos show a variably penetrant mutant midgut phenotype: incomplete constriction formation.
Homozygous embryos do not complete head involution, and tracheae are disconnected. Fusion of the midgut primordia and elongation of the hindgut and Malpighian tubules is variable.
Heterozygosity for this deletion has no effect on the mutant ovarian phenotype of ovoD2.
Hemizygous embryos were examined with polarised light microscopy and antibody staining: muscle pattern incomplete due to muscle absences.