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| Term | Definition |
|---|---|
| heredity | The passing of traits from parents to offspring |
| trait | A specific characteristics that an organism can pass to its offspring through its genes |
| genetics | The scientific study of heredity |
| fertilization | The process in sexual reproduction in which an egg cell and a sperm cell join to form a new cell |
| purebred | An offspring of many generations that has the same form of a trait |
| gene | A sequence of DNA that determines a trait and is passed from parent to offspring |
| allele | The different forms of a gene |
| dominant allele | An allele whose trait always shows up in the organism when the allele is present |
| recessive allele | An allele that is hidden whenever the dominant allele is present |
| hybrid | An offspring of crosses that has two different alleles for a trait |
| probability | A number that describes how likely it is that a particular event will occur |
| Punnet square | A chart that shows all the possible combinations of alleles that can result from a genetic cross |
| phenotype | An organisms physical appearance, or visible traits |
| genotype | An organism's genetic makeup, or allele combinations |
| homozygous | Having two identical alleles for a particular gene |
| heterozygous | Having two different alleles for a particular gene |
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