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Gregor Mendel The monk who studied pea plants and researched heredity and genetic traits.
Heredity The passing of inherited characteristics from generation to generation.
DNA A chemical code inside each cell that determines a persons traits. A-T/C-G
DominantTrait A genetic trait that appears in the first generation (child) and covers up the recessive trait.
Recessive Trait A weaker trait, covered up by a dominant trait in the first generation. It shows up in the second (grandchild) or later generation.
Gene One set of instructions for an inherited trait on the chromosomes.
Alleles A different form of the same gene, (ex. hair color) that controls an inherited trait.
Genotype The genes and inherited instructions for organism. 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.
Predigree Chart A diagram used to chase inherited traits through man generations of a family.
Homozygous Traits Inheriting two of the same genes fr a genetic trait (purebred) ex.: BB for brown eyes or bb for blue.
Hererozygous Traits Inheriting two DIFFERENT genes for a genetic trait. (hybrid) ex.: Bb for brown eyes