Biology UNIT 1

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  • B1
    • Genes
      • Genes carry instuctions that control how you develop and function. They do this by telling the cells to make proteins.
      • Genes are sections of long strands of DNA.
    • DNA
      • DNA is packed into structures called chromosomes (found in the nuclei).
      • DNA strands are made of four chemicals called bases. As well as phosphate groups and sugar molecules.
        • The order of the bases determine the amino acids produced.
    • Clones
      • Natural clones = individuals with identical genes. Any differences are due to environmental changes.
      • Artificial clones are produced when a nucleus from a body cell is transferred to an unfertilised egg.

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