| A | B |
| heredity | the passing of traits from parent to offspring |
| allele | the different forms a gene may have for a trait |
| sexual reproduction | when male and female cells combine to form a new cell |
| dominant | form of a trait that appears to mask another form of the same trait |
| recessive | form of a trait that seems to disappear in a population, but can reappear |
| Punnett square | chart used to predict results in Mendelian genetics |
| genotype | genetic makeup of an organism |
| homozygous | organism with two identical alleles for a trait |
| hetrozygous | organism with two different alleles for a trait |
| phenotype | observable characteristic; physical trait that shows as a result of a particular genotype |
| incomplete dominance | production of a phenotype that is intermediate to those of the two homozygous parents |
| Gregor Mendel | father of genetics |
| precentage | ratio that states the number of times an outcome is likely out of a possible 100 times |
| gene | basic unit of heredity, made of a segment of DNA on a chromosome |
| ratio | A comparison between two quantitites |
| hybrid | another name for a heterozygous organism |
| probability | chance that a specific outcome will occur out of total number of outcomes |
| purebred | organism that always produces the same traits in its offspring |