| A | B |
|---|
| Heredity | The passing on of characteristics from parents to offspring. |
| Genetics | The branch of biology that studies heredity. |
| Traits | Characteristics that are inherited. |
| Gametes | Another name for sex cells. |
| Fertilization | The uniting of male and female gametes. |
| Dominant | The trait that is observed, opposite of recessive. |
| Recessive | The trait that seems to "disappear". |
| Law of Segregation | Mendel's conclusion that a parent passes on one allele for each trait to its offspring. |
| Phenotype | The way an organism looks. |
| Genotype | The gene combination of an organism, type of genes. |
| F1 | The offspring of the P generation |
| Tt x Tt | genotype ratio-1TT:2Tt:1tt |
| Tt x tt | genotype ratio- 2TT:2tt |
| P generation | parental generation |
| Purebred | organism that has the same genes for a trait |
| Hybrid | organism that has 2 different genes for a trait |
| Incomplete dominance | genes are neither dominant of recessive for a trait; the blend |
| mutation | a sudden change in a gene or chromosome |
| mutagen | factors that cause a mutation |
| Gregor Mendel | Father of Genetics |
| Watson & Crick | discovered the the structure of DNA |
| Meiosis | process of producing gametes |
| Mitosis | process of producing body cells |
| zygote | fertilized egg consisting of 46 chromosomes |
