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Molecular Genetics is the branch of Biomolecular Chemistry concerned with the structure, function, and replication of DNA, RNA, and chromosomes. It explores how genetic information is encoded in the chemical structure of these molecules, how this information is transmitted during cell division and inherited across generations, and how it influences the development, growth, and behavior of organisms at the molecular level. Molecular Genetics integrates the principles and methods of Chemistry, Life Science, and Biomolecular Chemistry to provide a comprehensive understanding of the molecular mechanisms that regulate gene expression, genome stability, and evolution. It also informs various medical and biotechnological applications, such as gene therapy, genetic testing, and synthetic biology, which aim to improve human health and advance scientific research.