FIGURE 1.

Block‐like patterns in empirical data. (a) Block‐like patterns in phased DNA sequences from Mimulus auranticus within the gene MaMyb2 (Stankowski & Streisfeld, 2015). Rows show 24 individual haplotypes. Each column is a site, with yellow and blue squares representing ancestral and derived sites, respectively. (b) an F _ST scan across Heliconius chromosome 2 reveals a large plateau of differentiation on chromosome 2 between races of H. erato (Meier et al., 2021). This large block‐like pattern coincides with a chromosomal inversion, the boundaries of which are illustrated by the dashed line