Mutations + Natural Selection - PowerPoint PPT Presentation

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Mutations + Natural Selection

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  1. Mutations + Natural Selection Can This Power Evolution?

  2. What exactly is a mutation? • A mutation is a mistake or copying error in the genetic code. • If a mistake is made, the protein that is coded for will not be constructed properly and will be compromised in function—it won’t work right!

  3. Proteins Must Be Constructed Correctly to Function Properly

  4. The Most Common Mutations are Genetic Misspellings • Take 4 nails, measure 1.3 cm between each and nail. Make sure and start 6.2 cm from the outermost edge of the board. The wood must be coated with water seal first. • Take 4 nails, measure 1.3 cm bteween each and nail. Make sure and start 6.2 cm from the outermost edge of the board. The wood must be coated with water seal first. • Take 4 nails, measure 1.3 cm bteween each and nail. Make sure and start 6.m cm from the outermost edge of the board. The wood must be coated with water seal first.

  5. Most Mutations Have Very Little Net Effect By Themselves—They are called “near neutral.” • However, over time they add up. Like the rusting of a car over many years.

  6. According to Evolution Mutations Change Organisms For the Better • Over millions of years according to evolution, mutations (mistakes) will be beneficial and cause favorable traits to be expressed. • Slowly over time body plans will be altered/changed and new species will be produced • Natural selection + mutations cause evolution

  7. The evidence does not support this The overwhelming evidence points to natural selection acting on traits that were produced by preexisting genes. The evidence shows mutations to be harmful, not beneficial…let’s prove this point!

  8. Mutations are harmful Evidence One • http://www.genecards.org/cgi-bin/listdiseasecards.pl?type=full&no_limit=1 • There are thousands of clearly defined diseases that are documented to be mutant in origin. • There is not a single unambiguous beneficial mutation

  9. Evidence Two Geneticists theorize that it is possible that perhaps 1 in a million mutations might be beneficial. If this is true it still does not help evolution Genes are inherited in clusters, so even if there are beneficial mutations present they will be far outnumbered. It will still be down…not up. Mutations still kill and destroy information.

  10. Evidence 3 The data clearly illustrates that mutations can never CREATE code. The question still remains, where did the code come from? The answer cannot be mutations.