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Heredity

TermDefinition
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.
Created by: Br33zy