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Genetics: The interaction of an organism's genes with the environment…

- - - - variation in traits
    - - slow process nine months
  - - - no variation in offspring
    - - rapid reproduction
- - - - link to docs.google.com
- - - - base pairs(which are pairs of COMPOUNDS)
        
        cytosine(c4h5n30
        
        thymine(c5h6n202
        
        Guanine(c5h5n50
        
        adenine(C5H5N5
      - the basic physical unit of heredity; a linear sequence of nucleotides along a segment of DNA that provides the coded instructions for synthesis of RNA,which,when translated into protein,leads to the expression of heredity character.
    - - any of several threadlike bodies that carry the gene:Humans have 23 pairs,designated 1 to 22 in order of decreasing size and x and y for the female and male sex chromosomes respectively .