| A | B |
|---|
| heredity | the passing of traits from parent to offspring |
| dominant trait | the trait observed when at least one dominant allele for a characteristic is inherited |
| recessive trait | a trait that is apparent only when two recessive alleles for the smae characteristic are inherited |
| genes | segments of DNA that carry hereditary instructions and are passed from parent to offspring |
| alleles | different forms of a single gene |
| genotype | the inherited combination of alleles |
| phenotype | an organisms inherited appearance |
| probability | the mathematical chance that an event will occur |
| sex cells | an egg or sperm |
| homologous chromosomes | chromosomes with matching information |
| meiosis | cell division that produces sex cells |
| sex chromosomes | the chromosomes that carry genes that determine the sex of offspring |
