Gene orders

Gene orders are the permutation of genome arrangement. A fair amount of research has been done trying to determine whether gene orders evolve according to a molecular clock (molecular clock hypothesis) or in jumps (punctuated equilibrium).

Some research on gene orders in animals' mitochondrial genomes reveal that the mutation rate of gene orders is not a constant in some degrees.[1]

References

1. Grusea, Simona (September 2010). "Measures for the exceptionality of gene order in conserved genomic regions". Advances in Applied Mathematics. 45 (3): 359–372. doi:10.1016/j.aam.2010.02.002.