
Distribution of τ for each D. melanogaster chromosome arm. (Boxes) Interquartile range; (horizontal line in the middle of the boxes) median value; (whiskers) 1.5× the interquartile range (outliers were omitted), (dashed line) genome-wide average. Significant differences between τ for a given chromosome and the rest of the genome were assessed using a Mann-Whitney test; (*) P < 0.05; (**) P < 0.005. Distributions of τ were calculated for (A) genes with testis-biased expression (τ > 0.7), (B) genes with accessory-gland-biased expression (τ > 0.7), and (C) all genes.











