DNA sequencing is used for determining the order of nucleotides in a precise DNA molecule. This info is helpful for researchers in understanding the type of genetic info that is accepted in the DNA, which might affect its function in the body. It can then, help in the detection of genetic changes that might be related with producing some health condition.
DNA has a double helix structure with four chemical bases that continuously exist in the same pairs. The nucleotide adenine continuously pairs with thymine in DNA, and the nucleotide cytosine pairs with guanine. These pairs form the foundation of DNA molecules and the way cells repeat and divide. This concept lies at the core of the DNA sequencing approaches.