While expression of a single copy of TrlHsp83.GAGA.T:Ecol\lacZ has little effect on viability, expression of two copies at high temperatures significantly reduced viability. The surviving flies exhibit phenotypes including loss of the wing margin. Adding one copy of TrlR67 does not enhance the wing margin defects.
One copy of TrlR67 does not enhance the wing margin defects seen when two copies of TrlHsp83.GAGA.T:Ecol\lacZ are expressed at high temperatures.
Expression of a single copy of TrlHsp83.GAGA.T:Ecol\lacZ rescues the zygotic lethality in Trl13C/TrlR67 mutants. However the A6 to A5 abdominal transformation or the maternal-effect lethality are rescued.