Molecular Evolution
Molecular evolution is the study of how genetic material, like DNA and proteins, changes over generations through processes such as mutation and selection, revealing the mechanisms behind species adaptation and divergence. It bridges the gap between genetics and traditional evolutionary theory, helping us understand everything from viral outbreaks to human ancestry in a molecular context. Today, it's a powerhouse in fields like medicine, where it aids in tracking disease evolution and developing targeted therapies.
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Molecular evolution research uncovered that the genetic code is almost identical across all known life forms, with the same three-letter DNA codons specifying the same amino acids in organisms from bacteria to humans, pointing to a single common ancestor over 3.5 billion years ago. This universal code not only simplifies genetic engineering but also highlights how deeply connected all life on Earth truly is, a discovery that earned the 1968 Nobel Prize in Physiology or Medicine for scientists like Robert Holley, Har Gobind Khorana, and Marshall Nirenberg.
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