DNA - The molecule that carries all the instructions for how a living thing grows, develops, and works, Double helix - The shape of a DNA molecule, gene - A small section of DNA that codes for a specific characteristic, mutation - A change in DNA or number of chromosomes, genome - All of the DNA in an organism, including all of its genes, continuous variation - Differences in characteristics that can take any value within a range, discontinuous variation - Differences that fit into clear groups, adapted - When an organism has features that help it survive better in its environment., natural selection - When individuals with the best adaptations survive and reproduce, passing on those helpful characteristics., fossil - The preserved remains or traces of plants and animals that lived a long time ago, endangered - A species that is at risk of disappearing because there are very few left., extinct - A species that has completely died out and no longer exists anywhere on Earth, selective breeding - when humans choose the best individuals to breed to produce desirable traits,

Year 10 DNA and Variation

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