| A | B |
| DNA | deoxyribonucleic acid - blueprints of life |
| gene | segment of DNA coding for a particular trait |
| adenine | base which pairs with thymine |
| thymine | base which pairs with adenine |
| guanine | base which pairs with cytosine |
| cytosine | base which pairs with guanine |
| mutation | "mistake" in the sequence of bases |
| Watson & Crick | Nobel prize winning scientist credited with discovering DNA's double helix structure |