They also provided evidence that the selection leads to the independent, repeated emergence of similar or identical short sequence motifs by convergent evolution. Klein himself has long championed the view that this mechanism and mechanisms similar to it, rather than the generally favored "gene conversion", explained the origin of the motifs.
Additionally, they showed that selection causes the independent and repeated appearance of similar or identical short sequence patterns by means of convergent evolution. Klein has long maintained that this process and related mechanisms are more plausible explanations for the origins of these sequences than gene conversion.