Why is there such a large variation in size and noncoding DNA content amongorganelle genomes?

| April 14, 2018

Why is there such a large variation in size and noncoding DNA content amongorganelle genomes? One explanation is that this genomic variation results fromdifferences in the rates of organelle mutation and random genetic drift, asopposed to being the direct product of natural selection (Lynch et al. 2006).Along these lines, the mutational hazard hypothesis (MHH) holds that ‘excess’DNA is a mutational liability (because it increases the potential for harmfulmutations) and, thus, has a g … 

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