Double Forensics: What Is DNA?

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Now you may be thinking, “What is DNA?” It is the carrier of genetic information where an individual’s chromosomes control an array of characteristics. The whole body has DNA molecules in every cell of each individual, having a sequence of components arranged uniquely to themselves. Forensic scientists analyse DNA molecules (sweat, semen, saliva, blood, bone, etc) to perform comparisons to link someone to a crime or absolve them. Though, only a small part of the total variations can presently be examined.

DNA structure is composed of a double helix, constituting two strands twisted around one another. Each strand have a linear arrangement of building blocks called nucleotides or bases (adenine, thymine, cytosine and guanine). These strands
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