| A | B |
| traits | characteristics of living organisms |
| inherited traits | traits that are passed on from parents to offspring |
| heredity | the passing on of traits from parents to offspring |
| genetics | the modern science of heredity |
| genes | parts of chromosomes that control inherited traits |
| gametes | reproductive cells |
| meiosis | a kind of cell division that produces gametes and in which the number of chromosomes is reduced by 1/2 |
| pure | having two like genes |
| hybrid | having two unlike genes |
| dominant | a gene that always shows itself |
| recessive | a gene that is hidden when the dominant gene is present |
| blending | a combination of genes in which a mixture of the traits of both genes shows |
| selection | picking plants and animals for mating because of their traits |
| inbreeding | mating closely related individuals |