The Role of DNA in Heredity

In genetics, DNA plays a pivotal role in heredity as it carries the genetic instructions for the development, functioning, growth, and reproduction of living organisms. The sequence of nucleotides in DNA contains the genetic code that determines an organism's traits. This genetic information is passed down from one generation to the next, allowing for the transmission of hereditary characteristics. In South Africa, Grade 12 students studying biology and genetics can delve into the fascinating world of DNA and its impact on heredity, providing them with a deeper understanding of the fundamental principles underlying inheritance.