Fig. 3.

—Larger Y ampliconic gene families are more variable across great apes. The six scatter plots represent the relationship between median copy number and variance for each of the species, and the species name is present at the top of each plot. The x axis represents natural logarithm of median copy number and the y axis is a natural logarithm of variance in copy number. The Spearman correlations were calculated using the cor.test() function in R and the P values are in parentheses. The black line represents the linear function fitted to the given data points. The dots are color coded to represent the nine gene families, with missing dots indicating gene family absence in that species.