Unit 3: Genetics Animations   Study Guide

Chapter 18 Regulation of Gene Expression Review
  1. Regulation of protein production can occur by inhibition or by control, as illustrated in the E. coli operon.
     
     
     
     
  2. The trp operon is a system that is turned unless repressed by the repressor.
     
     
     
     
  3. The E. coli lac operon is an system that is turned unless induced by the inducer.
     
     
     
     
    • Expression of the lac operon is also subject to positive control: the operon is by the catabolite-activating protein (CAP), together with Cyclic adenosine monophosphate (cAMP) when is absent.
       
       
       
       
      lac operon review:
     
     
     
     
  4. In eukaryotes, gene regulation controls cell specialization and .
     
     
     
     
  5. Eukaryotic gene expression can be at many stages, from the nucleus to the cytoplasm.
     
     
     
     
  6. Multicellular organisms develop from a single-celled to cells of many different types through cell , cell , and morphogenesis.
     
     
     
     
    • Differential distribution of determinants in the egg can lead to subsequent of embryonic cells.
       
       
       
       
    • Expression of genes for tissue-specific proteins result in cell , and leads to observable .
     
     
     
     
  7. mutations are generally needed for full-fledged cancer; at least one active and accumulation of several mutant tumor- genes characterize most cancers. 
     
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