| A | B |
| Recessive | Traits that are weaker in an organism's genetic code. |
| Genotype | Made up of the alleles that an organism inherits from its prents (Bb). |
| Phenotype | The appearance, behavior, or characteristics of an organism as a result of its genotype (brown fur). |
| Genetics | Field of biology dedicated to understanding how characteristics are inherited. |
| Incomplete dominance | Genes are not completely dominant or recessive. |
| Co-dominance | The alleles of both parents are visible, but not blended. |
| Polygenic trait | When two or more genes affect human traits. |
| Inherited trait | A characteristic that is passed on from one generation to the next. |