A gene is a section of DNA that functions as a unit. It can be a sequence of the molecules A, T, C and G, that are the script for producing a specific protein, say hair protein.

In brief, this is what happens to turn a DNA blueprint for hair into an actual piece of hair:

1. An RNA copy of the DNA blueprint is made.


2. The RNA copy is used as a template to create a hair protein.


3. Many of these proteins join together to make actual hair.