Genes are tiny units of information found in our cells that determine how we look and function. They are made up of DNA, which carries the instructions for building proteins that play crucial roles in our bodies. For example, genes influence traits like eye color, height, and even some aspects of our health. Every person has a unique set of genes inherited from their parents, which is why siblings can look similar but still have differences. Scientists study genes to understand how they affect everything from diseases to behavior, helping us learn more about ourselves and how to improve our well-being.