| Term | Definition |
|---|---|
| allele | different forms of a gene |
| dominant allele | an allele whose trait always shows up in the organism when the allele is present |
| recessive allele | an allele that is masked or covered up whenever the dominant allele is present |
| genotype | an organisms genetic makeup, or allele combinations |
| heterozygous | having two different alleles for a trait |
| homozygous dominant | having two dominant alleles for a trait |
| homozygous recessive | having two recessive alleles for a trait |
| codominant | condition in which neither of two alleles of a gene is dominant or recessive |
| phenotype | an organisms physical appearance or visible traits |
