| A | B |
|---|
| TRAIT | a characteristic that an organism can pass on to its offspring |
| HEREDITY | a set of traits an organism receives from its parents |
| GENETICS | the study of heredity |
| CROSS-POLLINATION | when the pollen from one plant is used to fertilize another plant |
| GENE | a unit that determines traits |
| ALLELES | different forms of a gene |
| DOMINANT ALLELE | the form of a gene that, when present, covers up the appearance of the recessive allele |
| RECESSIVE ALLELE | the form of a gene that is hidden when the dominant allele is present |
| PHENOTYPE | the form of a trait that an organism displays |
| GENOTPES | the alleles of a gene an organism contains |
| COMPLETE DOMINANCE | when one allele is completely dominant over the other allele. Example: the flower color purple is dominant in peas and white is recessive |
| INCOMPLETE DOMINANCE | when the phenotype of the two alleles blend |
| CO-DOMINANCE | when an organism that has both alleles of a gene displays both phenotypes at the same time. |
| PROBABILITY | the mathematical chance that an event will occur (2:3, 2 out of 3, or 2/3) |
