Imprecise excision, resulting in a large, uncharacterized deletion.
lethal - all die during embryonic stage (with EcRM554fs)
lethal - all die during embryonic stage (with EcRW53st)
some die during embryonic stage (with EcRM554fs)
some die during embryonic stage (with EcRW53st)
EcRM554fs
EcRW53st
Selected as: F2 progeny with white eyes that cannot complement the EcRM554fs mutation for viability.