Homozygous males show no decrease in viability.
The muscle of Lawrence forms in fruΔA/Df(3R)fru4-40 males, as occurs in wild type.
Compared to controls, fruΔA/Df(3R)fru4-40 males show no significant difference in latency to courtship of or courtship index towards females. Levels of copulation are also normal. The males show normal levels of fertility over a one-week observation period. fruΔA/Df(3R)fru4-40 males do not show chaining behaviour (forming male-male courtship chains).