DNA is made up of unique combinations of the nucleotide bases Adenine, Guanine, Cytosine and Thymine. By extracting the DNA from tissue samples and sequencing it, the unique patterns are revealed.
(A) Gadus morhua (Atlantic cod). Photo: FDA
(B) Colorized Atlantic cod mt-CO1 sequence. Courtesy: Encyclopedia of Life
(C) Actual Atlantic cod mt-CO1 sequence. Courtesy: FDA
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