| A | B |
| Heredity | The passing of traits from parent to offspring. |
| Alleles | The different forms a gene will have for a trait. |
| Genetics | The study of how traits are inherited through the actions of alleles. |
| Dominant | The form of the trait that appears to cover up or mask another form of the same trait. |
| Recessive | The form of the trait that seems to disappear. |
| Punnett Square | A tool that shows how genes can combine. |
| Genotype | The genetic makeup of the organism. |
| Phenotype | The physical trait that shows as a result of the genotype. |
| Homozygous | The two alleles for a trait are exactly the same. |
| Heterozygous | The organism has two different alleles for a trait. |
| Gregor Mendel | The Father of Genetics |
| Incomplete Dominance | The production of a phenotype that is intermediate to those of the two homozygous parents. |
| Multiple alleles | A trait that is controlled by more than two alleles. |
| Polygenic Inheritance | Occurs when a group of gene pairs act together to produce a single trait. |
| Pedigree | A tool for tracing the occurrence of a trait in a family. |
| sex-linked genes | An that allele is inherited on the sex chromosome. |
| Genome | A chart that shows the location of individual genes on a chromosome. |