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Heredity
Term | Definition |
---|---|
Gregor Mendal | The monk who studied pea plants and researched heredity and genetic traits. |
Heredity | The passing of inherited characteristics from generation to generation. |
DNA | The chemical code inside each cell that determines a person's traits. A-T C-G |
Dominant Trait | A genetic trait that appears in the first generation (child) and covers up the recessive trait. |
Recessive Trait | A weaker trait, covered by a dominant trait in the first generation. It shows up in the 2nd (grandchild) or later generations. |
Gene | One set of instructions for an inherited trait on the chromosomes. |
Genotype | The genes and inherited instruction for organisms. Not all can be seen. |
Phenotype | The physical inherited characteristics that CAN be seen in an organism, such as hair, eye and skin color. |
Punnett Square | A chart that can predict all the possible combinations of offspring from particular parents. |
Pedigree Chart | A diagram used to trace inherited traits through many generations of family. |
Homozygous Traits | Inheriting 2 of the same genes for a genetic trait (purebred). Example: BB for brown eyes or bb for blue eyes. |
Heterozygous Traits | Inheriting 2 different genes for a genetic trait, (hybrid). Example: Bb for brown eyes. |
Alleles | A different form of the same gene, (ex. hair color) that controls an inherited trait. |