What is DNA and why is it important in genetics?

DNA, or deoxyribonucleic acid, is a molecule that carries the genetic instructions for the development, functioning, growth, and reproduction of all known living organisms. It is important in genetics because it serves as the blueprint for the biological makeup of an organism, determining its traits and characteristics. In South Africa, Grade 9 students learning about genetics and biology will understand how DNA carries hereditary information and how it influences genetic variation. This knowledge is crucial in understanding evolution, heredity, and the diversity of life on Earth.