| A | B |
| Gregor Mendel | father of genetics researched pea plants |
| trait | characteristic of an organism |
| dominant trait | stronger gene or trait in genetics |
| recessive trait | weaker gene or trait in genetics |
| allele | each form of a gene |
| meiosis | process that results in cells with only half the normal number of chromosomes |
| phenotype | visible characteristics of an organism |
| genotype | genetic makeup of an organism |
| gene | the basic unit of heredity |
| heredity | the passing of traits and enes from parent to offspring |
| heterozygous | organism with 1 dominant and 1 recessive trait |
| homozygous | an organism that has either both dominant OR both recessive traits |
| homologous chromosomes | chromosomes that have the same number of genes and structure |
| pedigree | a diagram that shows a genetic train in several generations of a family |
| probability | the likelihood that a possible future event will occur at any given instance of the event |
| sex chromosomes | carry genes that determine sex of an individual |