| A | B |
| recessive | can be covered up by dominant allele |
| dominant | dominates and covers up the recessive |
| genotype | represented by letters such as BB, Bb, or bb |
| heredity | has to do with the passing of traits to offspring |
| homozygous organism | has two identical alleles for a trait |
| Mendel | experimented with pea plants |
| alleles | different forms that genes have for a trait |
| phenotypes | physical traits of an organism |
| heterozygous organism | has two different alleles for a trait |