genetic variation - different codes for the same trait, genes - small sections of DNA; contains code for a trait, DNA - entire genetic code; blueprint for life, traits - characteristics passed from one generation to the next, phenotype - revealed trait, genotype - genes present for a trait, population - all of a species living in a given area, artificial selection - selective breeding based on traits chosen as most desired by humans; over time results in specific traits in population desired by humans, natural selection - organisms best adapted to an environment survive and reproduce; over time results in population best adapted to the environment , breed - species with special and distinct traits, offspring - young produced by parent(s); after reproduction the next generation, adaptation - traits that make an organism better suited for their environment to survive,

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