| A | B |
| genetics | The study of heredity. |
| heredity | The passing on of traits from parents to offspring. |
| dominant trait | The traits that are observed or show up when pared with a recessive trait. |
| recessive trait | The trait that is hidden or masked when paired with a dominant trait. |
| offspring | The child or children of a parent or parents. |
| gene | One set of instructions for a trait. |
| trait | A specific characteristic such as brown hair or red hair. |
| characteristic | A feature such as hair color. |
| alleles | Different forms of the same gene (often dominant or recessive). |
| Punnett Square | A graphic way to see possible combinations of gene pairs. |
| genotype | the gene makeup for a particular trait (Example Tt). |
| phenotype | The physical expression of a particular trait (Example flower color). |
| homozygous (pure) | An organism that has two dominant (TT) or two recessive (tt) alleles. |
| heterozygous (hybrid) | An organism that carries both a dominant and a recessive allele for a certain trait (Tt). |