| A | B |
| Allele | Different version of a gene |
| Codominance | 2 alleles are equally dominant and both will appear if inherited together (ex. roan coat color) |
| Gene | part of DNA that determines the trait |
| Heterozygous | having 2 different alleles |
| Homozygous | have the same alleles |
| Incomplete Dominance | situation where one allele is not completely dominant over the other (ex. flower color) |
| Law of independent assortment | states that during gamete formation genes for different traits separate without influencing the other |
| Multiple alleles | having more than 2 possible alleles for one trait (ex. blood type) |
| Polygenic inheritance | skin and hair color are examples of this type of inheritance pattern |
| Principle of dominance | Some alleles are dominant and some alleles are recessive |
| Trait | distinguishing characteristic or quality |
| Male | XY |
| Female | XX |
| Genotype | genetic make up on an individual |
| Phenotype | physical display of genetic makeup |