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.
They provided evidence showing that selection leads to the independent, repeated occurrence of similar or identical short sequence motifs through convergent evolution. Klein advocates for mechanisms other than gene conversion as explanations for the origin of these motifs.