DNA , the molecule that holds your body’s instructions, Genetics, the study of how traits are passed from parents to kids, Chromosomes, structures that carry genes, Gene, a small part of DNA that controls one trait, Nucleus, the part of the cell where DNA and chromosomes are found, Heredity, the passing of traits from one generation to another, 0.1% difference, what makes every person unique, Environment, things like food, habits, and lifestyle that affect traits, 20,000, about how many genes humans have, Trait, any characteristic you can observe.

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