The duplication/random loss model for gene rearrangement exemplified by mitochondrial genomes of deu

One model for gene rearrangement specifies that a portion of the genome is duplicated, followed by the random loss of the now supernumerary genes. Depending on which genes are lost, this process may reorder the duplicated block of genes. Comparisons of mitochondrial genomes have many advantages for addressing the processes of molecular evolution, including gene rearrangement. Here is an analysis of those variations in mitochondrial gene arrangement observed so far among the best sampled group, the deuterostome animals. The duplication/ random loss model is invoked to potentially reconstruct many, though not all, of these rearrangements.

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