Fig. 4

Tranylcypromine increases eye colour variation. Side-by-side comparison of eye colour changes of adult male flies treated in F0/P//F1 generation with DMSO (Fig. 3b) or Tranylcypromine dissolved in DMSO (Fig. 3a), respectively. F1 generation of Tranylcypromine/DMSO feeding included (a), or excluded (b). Student’s T test (one-sided, homoscedastic) between DMSO treatment and treatment with Tranylcypromine in DMSO in the defined generation: F0/P *, F1 Ø (p = 0.0624), F2 Ø, F3 Ø, F4 *, F5 Ø, F6 ** (p = 0.0052). Compared to the control, DMSO fed flies have a significant reduced eye colour in F4 (**) and F6 (***) whereas eye colour of F4 to F6 flies fed with Tranylcypromine/DMS0 are not significantly different to the eye colour of control flies (see Figs. 4, 6). n measurements: control n = 177 (92 + 85), all others as in the legends of Fig. 3