Fig. 4.

Locomotor activity profile of different fly lines under 18 and 25 °C in three days of LD followed by 3 days in DD (yellow boxes shows photoperiod in LD 12:12). Level of activity (y-axis) plotted against bins of activity (x-axis). A) D. pseudoobscura (Flagstaff), B) D. melanogaster Canton-S, C) w; tim⁰¹, tim^ps/tim⁰¹ (tim19), D) w; tim⁰¹, tim^ps/tim⁰¹ (tim21), E) per⁰¹; tim⁺; per^ps/+ (I26), F) per⁰¹/Y; tim⁰¹, tim^ps/tim⁰¹; per^ps/+ (19), G) per⁰¹/Y; tim⁰¹, tim^ps/tim⁰¹; per^ps/+ (21). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)