DNA-seq, or DNA sequencing, is a method used to determine the precise order of nucleotides in a DNA molecule. This technique allows scientists to read the genetic code, which is essential for understanding the functions of genes and how they contribute to various biological processes. By analyzing the sequences obtained from DNA-seq, researchers can identify genetic variations, study evolutionary relationships, and diagnose genetic disorders. This technology has become a fundamental tool in fields such as genomics, medicine, and biotechnology, enabling advancements in personalized medicine and targeted therapies.