Figure 4.
Survivors are not ancestrally specialized for expression in reproductive tract tissues. Coefficients for testis- and ovary-specific expression (circles) and 95% confidence intervals (bars) from logistic regression models of gene survival on sex-specific chromosomes in mammals (blue), birds (pink), and snakes (purple), conditional on breadth of expression. (ns) P > 0.05. After controlling for expression breadth, the regression coefficient is not significantly different from 0 for any tissue from any species.
