| Term | Definition |
|---|---|
| Gene | An inherited factor (region of DNA) that helps determine a characteristic |
| Allele | One of two or more alternative forms of a gene |
| Locus | Specific place on a chromosome occupied by an allele |
| Genotype | Set of alleles possessed by an individual organism |
| Heterozygote | An individual organism possessing two different alleles at a locus |
| Homozygote | An individual organism possessing two of the same alleles at a locus |
| Phenotype | The appearance or manifestation of a or characteristic |
| Characteristic or character | An attribute or feature possessed by and organism |