Our knowledge of mitochondrial disorders has expanded enormously through advances in mitochondrial DNA (mtDNA) research during the last decade. This has also provided information about the complicated genotype-phenotype relationship based on distinct characteristics of mtDNA itself. These include multicopy, vulnerability to the mutation, and cytoplasmic inheritance. There are complications of heteroplasmy, tissue/cell specificity, accumulation of mutations and material inheritance.
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Yu‐ichi Goto (2001) studied this question.
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