The courtship index of heterozygous males towards decapitated Canton-S males is not significantly different from that of wild-type males towards decapitated Canton-S males. Homozygotes to some extent show high mortality during the first 2 days of adult life. Homozygous males are infertile, probably due to weakness.
Only a few homozygotes die during preimaginal development and more than 85% of homozygotes eclose. The surviving adults never survive for more than 48 hours after eclosion.