Figure 3: Analysis of selective pressure in the human, chimpanzee and gorilla lineages.
From: The evolutionary history of genes involved in spoken and written language: beyond FOXP2
Violin plot of selection coefficients for the three primate lineages (median, white dot; interquartile range, black bar). Selection coefficients (γ) are classified as strongly beneficial (100, 50), moderately beneficial (10, 5), weakly beneficial (1), neutral (0), weakly deleterious (−1), moderately deleterious (−5, −10), strongly deleterious (−50, −100), and inviable (−500).
