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Concept
Archaeogenetics
Summary
Archaeogenetics is the study of ancient DNA using various molecular genetic methods and DNA resources. This form of genetic analysis can be applied to human, animal, and plant specimens. Ancient DNA can be extracted from various fossilized specimens including bones, eggshells, and artificially preserved tissues in human and animal specimens. In plants, ancient DNA can be extracted from seeds and tissue. Archaeogenetics provides us with genetic evidence of ancient population group migrations, domestication events, and plant and animal evolution. The ancient DNA cross referenced with the DNA of relative modern genetic populations allows researchers to run comparison studies that provide a more complete analysis when ancient DNA is compromised.
Archaeogenetics receives its name from the Greek word arkhaios, meaning "ancient", and the term genetics, meaning "the study of heredity". The term archaeogenetics was conceived by archaeologist Colin Renfrew.
In February 2021, scientists reported the oldest DNA ever sequenced was successfully retrieved from a mammoth dating back over a million years.
Ludwik Hirszfeld was a Polish microbiologist and serologist who was the President of the Blood Group Section of the Second International Congress of Blood Transfusion. He founded blood group inheritance with Erich von Dungern in 1910, and contributed to it greatly throughout his life. He studied ABO blood groups. In one of his studies in 1919, Hirszfeld documented the ABO blood groups and hair color of people at the Macedonian front, leading to his discovery that the hair color and blood type had no correlation. In addition to that he observed that there was a decrease of blood group A from western Europe to India and the opposite for blood group B. He hypothesized that the east-to-west blood group ratio stemmed from two blood groups consisting of mainly A or B mutating from blood group O, and mixing through migration or intermingling. A majority of his work was researching the links of blood types to sex, disease, climate, age, social class, and race.
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