| A | B |
|---|
| heredity | passing of physical characteristics from parents to offspring |
| trait | a specific characteristic, such as height or eye color |
| genetics | the scientific study of heredity |
| fertilization | the joining of a sperm and egg |
| purebreed | an organism that has the same two alleles of a trait |
| gene | the factor that controls a trait |
| allele | the different form of a gene |
| dominant | the stronger trait which always shows up when present |
| hybrid | an organism that has 2 different alleles for a trait |
| recessive | the weaker trait which only shows up when both alleles are present |
| Gregor Mendel | the grandfather of genetics |
| height | an example of a trait that Medel studied in pea plants |
| heterozygous | an organism that has two different alleles for a trait |
| homozygous | an organism that has two identical alleles for a trait |
| genotype | an organism's genetic makeup, or allele combinations |
| phenotype | an organism's physical appearance |
| meiosis | cell division in sex cells, resulting in an egg or sperm |
| Chromosome Theory of Inheritance | A theory that genes pass from parents to offspring on chromosomes |
