Sequencing a genome means determining the precise order of the four chemical building blocks—adenine (A), thymine (T), cytosine (C), and guanine (G)—that make up an organism’s DNA. These building blocks, called nucleotides, form the genetic code stored in an organism’s chromosomes. The process involves reading the DNA strand by strand to produce a complete or partial map of the genome, which is the organism’s full set of genetic instructions.
For example, the human genome contains about 3 billion nucleotide pairs. Sequencing it involves using specialized machines to “read” the DNA, often breaking it into smaller fragments, analyzing them, and then assembling the data into the correct order using computational tools. This can reveal information about an organism’s traits, potential diseases, or evolutionary history.
Think of it like decoding a massive book of instructions for building and running a living thing. It’s used in research, medicine (like identifying genetic disorders), and even personalized healthcare. If you want more specifics, like how it’s done or its applications, let me know!
Source: National Human Genome Research Institute (NHGRI)
