A genetic sequence is a specific order of nucleotides in a DNA or RNA molecule. These nucleotides, represented by the letters A (adenine), T (thymine), C (cytosine), and G (guanine), form the building blocks of genes. Each sequence carries instructions for building proteins, which are essential for the structure and function of living organisms. Scientists analyze genetic sequences to understand how traits are inherited and how organisms develop. This information is crucial in fields like genetics, medicine, and evolutionary biology, helping researchers identify genetic disorders and develop targeted therapies.