FLP induced recombination between the FRT sites has removed the y promoter sequences and the first 1625bp of the y transcription unit, as well as the loxP site at approx -900bp relative to the transcription start.
abnormal body color, with yunspecified
Body colour: yP1\loxP.pro-; yunspecified flies have a body color score or 1/5 (where 1 is y- and 5 is wild-type) for all insertions characterised.