Imprecise excision of {lacW}BRWD3s5349 has deleted genomic sequence from +328 (in exon2) to +1999 (in exon6) relative to the start of the BRWD3 coding region.
Somatic clones of BRWD3PX1 homozygous cells do not survive in the adult eye, but eyes developing from discs that contain such clones have visible scars. Retinal sections reveal these scars to be the result of incomplete ommatidia.