DNA, chromosomes, and genes are essential for the genetic composition of living organisms. DNA carries the instructions for the development, growth, reproduction, and functioning for the life you live and the characteristics that make you unique. The major function of chromosomes is to carry the hereditary code from one cell generation to the next. Genes are at the centre of everything that makes us human. Genes are responsible for producing the proteins that run everything in our bodies. These components work together to determine our traits and characteristics. Overall, DNA, genes and chromosomes work together to make you who you are.