| A | B |
| Acquired trait | Characteristic that is not passed on. |
| Punnet square | Diagram with four squares/alleles of 1 parent across top/other parent on the side. |
| Probability | Mathematical chance that an event will occur. |
| Mutation | Change in the genetic material. |
| Point mutation | When a single nucleotide is added, removed, or replaced. |
| Recessive disorder | Disease will appear only if a person receives a defective gene from both parents. |
| Sex-linked disorder | genes for these disorders are carried on sex chromosomes. |
| DNA fingerprint | Pattern of bands that meke up the specific fragments of a person's DNA. |