Character makeup is the process of applying makeup to an actor or actress in order to create a certain look or character. It is often used in film and television to create a desired effect or to help an actor or actress look more like the character they are playing. Genes are the basic units of heredity that are passed from parent to offspring and determine physical characteristics. Character makeup is often used to alter an actor's physical features to better match the character they are playing, such as changing their hair color or skin tone.