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Genetics Vocabulary
Genetics Unit Vocabulary
| Term | Definition |
|---|---|
| heredity | the passing of traits from parents to offspring |
| genetics | the scientific study of heredity |
| gene | a segment of DNA on a chromosome that codes for a specific trait |
| allele | different versions of a gene |
| dominant trait | describes a trait that covers over, or dominates, another form of that trait |
| recessive trait | a trait that is expressed only when two recessive alleles for the same characteristic are inherited |
| genotype | genetic makeup of an organism |
| phenotype | observable traits and physical appearance |
| homozygous | an organism that has two identical alleles for a trait |
| heterozygous | an organism that has two different alleles for a trait |
| traits | characteristics that are inherited |
| F1 generation | the first generation of offspring obtained from a cross of two orgaisms |
| pedigree | a diagram that shows the occurrence of a genetic trait in several generations of a family |