Fig. 3.

Plots of the same quantities shown in Fig. 2 but for a sample of size $n={10}^5$ under pure exponential growth with $\beta /n=3$. a) Probability of observing $n_1$ copies of allele 1 in the sample given $k_1=1,2,3,4,5$ latent mutations. b) ${\log }_{10}$-probability of observing $n_1$ copies of allele 1 in the sample for three different mutation rates, corresponding to the values of $\theta {\pi }_1$: $0.002$, $0.02$ and $0.2$ in Fig. 2, but here expressed in terms of expected numbers of mutations on the gene genealogy (44): $0.024$, $0.24$ and $2.4$. Probabilities in both panels are normalized to sum to one for $n_1\in \{1,2,\dots ,40\}$.