Genes, Genetics & DNA
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Created by:
hcps-comerbt on February 2, 2011
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16 terms
Terms | Definitions |
|---|---|
 Trait | A characteristic that an organism can pass on to its offspring through its genes |
| Heredity | The passing of traits from parents to offspring |
| Genetics | The scientific study of heredity |
| Purebred | An organism that always produces offspring with the same form of a trait as the parent |
| Gene | A segment of DNA on a chromosome that codes for a specific trait |
| 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 masked when a dominant allele is present |
| Hybrid | An organism that has two different alleles for a trait; an organism that is heterozygous for a particular trait |
| Probability | The likelihood that a particular event will occur |
| Punnett Square | A chart that shows all the possible combinations of alleles that can result from a genetic cross |
| Genotype | An organism's genetic makeup, or allele combinations |
| Phenotype | An organism's physical appearance, or visible traits |
| Homozygous | Having two identical alleles for a trait |
| Heterozygous | Having two different alleles for a trait |
| Codominance | A condition in which neither of two alleles of a gene is dominant or recessive |
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