DNA is the material in your cells that carries out instructions for how your body grows, looks, and works. Your eye colour is an example of how your DNA is. A gene is a small section of DNA that codes for a specific trait or function in the body, like your hair colour – whether it’s brown, black, etc. An allele is a different version of a gene that can determine a specific trait example, if your parents have brown eyes, you’re most likely to have brown eyes too. Punnett squares are a simple chart that is used to predict traits being passed from parents to offspring, like Parent 1 (B), Parent 2 (b), and can predict possible combinations (BB, Bb, bb) can be predicted.