Figure 5.
Scatterplot showing M:F ratios of gene expression in zebra finch and chicken for autosomal (A) (red) and Z genes (green). M:F ratios were compared in zebra finch telencephalon in day 45 versus adult samples (A), in chicken embryonic brain versus zebra finch adult brain (B), and in chicken embryonic heart versus brain samples (C). Within species (A,C), M:F ratios were more correlated for Z genes than for A genes. Between species (B), Z gene M:F ratios were only weakly correlated, and A gene M:F ratios were uncorrelated. Correlation coefficients were: (A) Z genes, r = 0.91; A genes, r = 0.35; (B) Z genes, r = 0.16; A genes, r = 0.05; (C) Z genes, r = 0.79, A genes, r = 0.29.
