Polytene chromosomes normal.
Transheterozygous combinations of l(1)17Aa12748 and l(1)16Fc459 causes dominant lethality in a tta background and transheterozygous combinations of l(1)17Ab17516 with l(1)17Aa12748 and por15175 are lethal in a tta background.
Gynandromorph analysis demonstrates the mutation is lethal.
Mutation in the maternal effect I (MEI) region of the Sh complex.
Mutation within the maternal effect I (MEI) region of the Sh complex.