| Term | Definition |
| trait | features inherited from parents |
| hereditary | passing of traits |
| genes | control traits |
| alleles | a form of a gene |
| genetics | science of how traits are inherited |
| purebred | an organism that always produces the same traits as in an off spring |
| Dominant | trait that always shows |
| recessive | a gene that only shows with another of the same type |
| punnett square | a handy tool for predicting results in Mendelian genetics |
| genotype | shows organisms alleles |
| phenotype | what the traits look like |
| homozygous | 2 alleles for the same trait |
| hybrid | 2 different alleles for the same trait |