Imprecise excision of the P{Car20}Ubc7Car20 element resulting in a 1.1kb deletion of genomic sequences. This deletion removes 1.1kb of the Ubc7 transcription unit (3'UTR plus 186 codons).
lethal - all die before end of larval stage | recessive
some die during larval stage | recessive
Lethal phase is between the first and second larval instar.