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Ch 3 Genetics
| Term | Definition |
|---|---|
| heredity | The passing of traits from parents to offspring |
| trait | A specific characteristic that an organism can pass to itd offspring to 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 |
| 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 |
| probabilty | A number that describes how likely it is that a particular event will occur. |
| Punnett square | A chart that show all of the probabilities of a cross of alleles |
| phenotype | An organisms physical traits |
| genotype | An organisms genetic makeup |
| homozygous | having two particular alleles for a specific gene |
| heterozygous | having two different alleles for a particular gene |