| A | B |
| DNA | Deoxyribonucleic Acid, genetic material found mainly in the nuclei of living things. |
| Genetic Code | Arrangement of four chemical 'letters' on a DNA molecule that can be arranged into 'words' that form instructions for making an organism. |
| Chromosomes | A structure in which DNA is arranged and along which genes are located. |
| Gene | A segment of DNA, located at one particular place on a chromosome, which determines a specific characteristic of an organism. |
| Alleles | A possible form of a gene. |
| Meiosis | A type of cell division that produces four sex cells from one parent cell; each sex cell contains half the genetic material of the original cell. |
| Mitosis | A type of cell division that produces two identical daughter cells from one parent cell. |
| Purebred | Referring to a plant or animal that has ancestors all with the same form of a trait. |
| Hybrid | An organism produced by crossing two individuals purebred for different forms of a trait. |
| Dominant Trait | The outward form observed when two opposite acting alleles are inherited. |
| Recessive Trait | The outward form observed only when two same-acting, non-dominant alleles are inherited. |
| Incomplete Dominance | A pattern of inheritance seen when two different alleles are present but NEITHER is dominant. |