Additional file 2: of Environmental cycles regulate development time via circadian clock mediated gating of adult emergence

Frequency distribution of free-running period. Histogram of free-running period estimated for individual flies after 7 generations of backcrossing using chi-square periodogram. The inverted brackets indicate the range of flies designated as each of the three genotypes. Mean free-running period for each genotype is shown in parentheses. (PDF 138 kb