| A | B |
| heredity | the passing of traits from parent to offspring |
| dominant trait | the trait observed when at least one dominat allele for a characteristic is inherited |
| recessive trait | a trait that is apparent only when two recessive allelles for the same characteristic are inherited |
| genes | segments of DNA that carry hereditary instructions are passed from parent to offspring |
| alleles | different forms of a single gene |
| genotype | the inherited combination af alleles |
| phenotype | an organism's inherited appearance |
| probabilty | the mathematical chance that an event will occur |