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Concept 19.4
Concept 19.4
Concept 19.4
Concept 19.4
Concept 19.4
Concept 19.4
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Concept 19.4

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Transcript

  • 1. Concept 19.4: Eukaryotic Genomes canhave many noncoding DNA sequences in addition to genes WILL S., MICHELLE K., REX L., MAYA H.
  • 2. Remember Transposable Elements? Chapter 18: nucleic acid segments,  PROKARYOTES recombination (movement) within genome Chapter 19: EUKARYOTES 1940s – 1950s Barbara McClintock  Bred corn  Different kernel colors
  • 3. What are Transposons and Retrotransposons? Eukaryote Transposons 2 types:  Transposons: transposable elements move using DNA intermediate  Retrotransposons: transposable elements move using RNA intermediate (transcript of the retrotransposon DNA)
  • 4. How do these Transposons Move? Cut & Paste Copy & Paste RNA = ALWAYS Copy & Paste  RNA intermediate made  Reverse transcriptase  transposon copy  Insertion new place Evolutionary Advantage
  • 5. Sequences Related to Transposable Elements Many copies Some similar some not Some move some can’t  Move through enzymes Make up large part of genome Alu elements – 10% human genome  Codes for RNA molecules Most transposable elements = “noncoding” DNA
  • 6. Is there an animation to simplify all of these words? Yes! (that may have been overenthusiastic)

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