| A | B |
| trait | a special feature that a thing has |
| genetics | study of how traits are passed from parents to offspring; scientific study of heredity |
| heredity | the passing of traits |
| dominant | gene that keeps another gene from showing its traits |
| recessive | gene that does not show its trait when dominant genes are resent |
| gene | small section of chromosome that determines traits of living things |
| hybrid | living things with a dominant and a recessive gene for a trait |
| purebred | organisms that have the same genes |
| incimplete dominance | neither gene masks the other |
| probability | mathematical term like hypothesis |
| Punnett Square | a way to show which genes will cimbine when an egg and sperm join |
| phenotype | visible characterics (physical appearance) |
| genotype | genetic make-up of an organism |
| chromosome | cell part with information that determines which traits a living thing will have |
| mutation | any change in the DNA code |