female sterile (with byn1)
female sterile (with byn2)
partially lethal (with byn1)
partially lethal (with byn2)
short lived (with byn1)
short lived (with byn2)
Only a few caudal visceral mesoderm cells develop. These cells form clusters that are less compact than wild type and migrate more slowly than wild type.
Homozygous embryos exhibit reduced hindgut and anal pads, primary cause is ectopic cell death in the primordia. Transheterozygotes with byn1 and byn2 allow some (1-25%) survive to adulthood, no escapers are obtained from transheterozygotes with byn3, byn5 and byn6. Escaper adults appear morphologically normal but females are sterile (no eggs in the egg chambers have progressed beyond stage 7 of ovarian development). Escapers usually die 1-2 days after eclosion.
P{Trg20} can rescue the lethality of byn4/Df(3L)vin4 transheterozygous embryos.