Mitochondrial DNA
Mitochondrial DNA was discovered in the 1960s by Margit M. K. Nass and Sylvan Nass by electron microscopy as DNase-sensitive threads inside mitochondria, and by Ellen Haslbrunner, Hans Tuppy and Gottfried Schatz by biochemical assays on highly purified mitochondrial fractions.
Douglas C. Wallace
Wallace and his colleagues demonstrated that human mitochondrial DNA is inherited exclusively from the mother and reconstructed the origin and ancient migration patterns of women using variations in mitochondrial DNA sequences.