DNA, or deoxyribonucleic acid, is the molecule that carries the genetic instructions for all living organisms. It contains the information needed to build and maintain cells, and it is passed from parents to offspring. DNA determines many traits such as eye color, height, and susceptibility to certain diseases.

The structure of DNA is like a twisted ladder called a double helix, made up of four chemical bases. Scientists study DNA to understand genetics, heredity, and evolution. Advances in DNA research have led to important developments in medicine, forensics, and biotechnology. Shutdown123