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Variance in male (left panel) and female (right panel) expression of autosomal (gray) and Z-linked (red) flycatcher genes averaged over seven nonreproductive tissues. Genes are categorized as having an M:F ratio of 0.5–1.5 (unbiased or compensated) or 1.5–2.5 (male-biased or uncompensated). Error bars indicate 95% confidence intervals for the distribution.
