| A | B |
|---|
| trait | physical characteristics |
| heredity | the passing of traits from parents to offspring |
| purebred | one that always produces offspring with the same form of a trait as the parent |
| gene | factors that control traits |
| alleles | different forms of a gene |
| recessive allele | a trait that is masked or covered up whenever a dominant allele is present |
| dominant | a trait that always shows up in the organism when the allele is present |
| hybrid | have two different alleles for the same trait |
| probability | the likelihood that a particular event will occur |
| Punnett Square | a chart that shows all the possible outcomes of a genetic cross |
| genotype | genetic make or allele make up |
| phenotype | an organisms physical appearance |
| homozygous | two identical alleles for a trait |
| heterozygous | two different allelles for the same trait |
