Click any letter for dictionary terms beginning with the letter selected.
| A | B | C | D | E | F |
| G | H | I | J | K | L |
| M | N | O | P | R | S |
| T | U | V | W | X | ? |
The tiny factors that control the way the body’s cells grow and behave. Each person has a set of many thousands of genes inherited from both parents. Genes are found in every cell of the body.