.../UAS cross and found a strange phenotype which (as we know) have not ...Basically, the flies develop large 'air bulbs' in their belly, proboscis, and wing....... Then, after several hours, the 'bulbs' on belly and mouth will turn ... Then they looks like real tumor now.... The 'bulbs' on wing usually resulted ...is possible. If anybody have any idea on such phenotype, please write back. Thank you very...