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Heredity
| Term | Definition |
|---|---|
| heredity | the passing of traits from parent to offspring |
| recombinant DNA | one form of genetic engineering in which a useful segment of DNA is inserted into a bacterium |
| genetics | the study of how traits are inherited through the interaction of alleles |
| sex-linked gene | an allele carried on a sex chromosome (the X or Y 23rd chromosome) |
| recessive | the trait that seems to disappear in the organism because it is covered up, or dominated |
| probability | the chances that an event will occur |
| genotype | the genetic makeup of an organism, usually shown in letters |
| phenotype | the way an organism looks and behaves as a result in its genotype |
| incomplete dominance | when the offspring of two homozygous parents shows an intermediate (in-between) phenotype |
| polygenic inheritance | occurs when a group of gene pairs acts together to produce a trait |
| alleles | the different forms of a trait that make up a gene pair |
| genes | section of DNA on a chromosome that contains instructions for making specific proteins |
| hybrid | organism that receives different genetic information from each parent |
| dominant | the form of a trait that covers up the recessive form |
| homozygous | an organism with two alleles that are the same for a trait (TT or tt, for example) |
| heterozygous | an organism that has two different alleles for a trait (Tt, for example) |