Figure 1.—

Rhythmic phenotypes in M. domestica. (A) Locomotor activity of individual flies is double plotted so that day 1 and day 2 activity is placed on the first horizontal line, day 2 and day 3 on the second line, etc. (Left) LD12:12. (Middle) Four days in LD12:12 followed (open arrow) by 8 days in DD. (Right) Five days in LD12:12 after which (open arrow) the flies were maintained in LL for 4 days. (B) Circadian pupal–adult eclosion. Newly emerging flies were observed in dim red light after previous entrainment in LD12:12. Eclosions were followed every 2 hr.