Asian Journal of Medical Principles and Clinical Practice

Mitochondrial DNA (mtDNA) research holds crucial significance for understanding fundamental biological mechanisms and has wide-ranging applications in forensic science and clinical diagnosis. This paper offers an extensive overview of mitochondria, the structure of mitochondrial DNA, the D-Loop control region, the 12S gene, mtDNA copy number, heteroplasmy, maternal inheritance, mtDNA replication processes, the genetics of mitochondrial diseases, genome analysis, and Next-Generation Sequencing (NGS) platforms. Furthermore, the review explores the forensic utility of mtDNA, covering kinship analysis, investigative applications, medical diagnostics, mtDNA quantification, differentiation between human and animal blood, Polymerase Chain Reaction (PCR), and mtDNA sequencing. The analysis indicates that mitochondrial DNA serves as a reliable marker for tracing the ancestry of various populations. It is a vital area of research across disciplines such as evolutionary anthropology, population genetics, medical genetics, genetic genealogy, and forensic science. The expression of mtDNA is essential for generating ATP via oxidative phosphorylation across all eukaryotic organisms. These mitochondrial structures are thought to link mtDNA replication and transcription mechanisms. Research involving ancient DNA has established a strong correlation between the availability and nutritional composition of diet and diversity in natural populations. In recent years, the emergence of Next-Generation Sequencing (NGS) technologies has instigated a fast and definitive shift, advancing scientific inquiry and contributing substantially to deeper biological understanding. This comprehensive review concludes that mitochondrial DNA is a highly effective and potent instrument for individual identification, tracing population origins, and diagnosing genetic disorders, thereby pioneering new research and practical applications in these critical areas.