NS vs. AS

NS vs. AS

1. Natural Selection

   • Natural selection is the process through which populations of living organisms adapt and change.
     • Mutation
       • A mutation is a change that occurs in our DNA sequence,
     • Adaptation
       • An adaptation is any heritable trait that helps an organism,
     • the three most important things are variation, speciation, and mutation
       • Examples: Because they could access food, the giraffes with longer necks were better able to survive and reproduce, with their offspring inheriting their long necks.

2. Artificial Selection

   • Artificial selection is the identification by humans of desirable traits in plants and animals,
     • Gene modification
       • Gene Modification is the process of altering genetic make up of an organism to improve traits
       • The con of GMO foods are that they may cause allergic reactions because of their altered DNA and they may increase antibiotic resistance. One pro is More nutritious food.
     • Selective breeding
       • Selective breeding involves choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics.
       • one pro is Selective breeding can produce plants that have a better resistance to pests or disease. one con is It can lead to loss of species variety.
     • Gene therapy
       • Gene therapy is what is used to correct faulty genes
       • One con could that it is targeting the wrong cells. One pro is It can wipe out genetic disease

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