Change in coding and noncoding genome sizes in reaction to changes in N or μ for the different mutational biases. Blue boxes (on the left of each condition) show the results with a mutational bias (left: insertion bias, right: deletion bias), and gray boxes (on the right of each condition) show the results without mutational bias. Depicted values are the ratio of the coding/noncoding sizes at the final generation over the value at generation 0.