Fig. 1
From: Split-alignment of genomes finds orthologies more accurately
Illustrations of genome evolution. a Sketch of a genomic segment evolving over time, illustrating orthology and paralogy. b An example of asymmetric duplication (retrotransposition). c An example of symmetric duplication (non-allelic recombination). d A complex rearrangement, ascribed to three template switches during one DNA replication event [47]. The pink segment is inverted, and the green segment is duplicated