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Background The evolutionary dynamics of repeat sequences is quite complex, with some duplicates never having differentiated from each other. Two models can explain the complex evolutionary process for repeated genes—concerted and birth-and-death, of which the latter is driven by duplications maintained by selection. Copy number variations caused by random duplications and losses in repeat regions...
Background The molecular basis of evolutionary change is assumed to be genetic variation. However, growing evidence suggests that epigenetic mechanisms, such as DNA methylation, may also be involved in rapid adaptation to new environments. An important first step in evaluating this hypothesis is to test for the presence of epigenetic variation between natural populations living under different environmental...
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