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Useful Genetics Professor Rosie Redfield The University of British Columbia. This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license. Lecture 1D. The history of DNA. ??. Outline:. DNA replication The Cell Theory in biology

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  1. Useful Genetics Professor Rosie Redfield The University of British Columbia This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

  2. Lecture 1D • The history of DNA ?? Outline: DNA replication The Cell Theory in biology A ‘DNA Theory’ for genetic information DNA’s evolutionary continuity Learning objectives: • Describe DNA replication • Explain the role of DNA replication in the history of DNA

  3. DNA replication Image from Wikimedia Commons

  4. DNA replication Image from Wikimedia Commons

  5. DNA replication

  6. Evolutionary continuity of life Archaea Bacteria Eukaryotes Most recent common ancestor of all life

  7. The Cell Theory in biology Omnis cellulaecellula "Every cell originates from another existing cell like it, by cell division.” Virchow’s cell drawings from Wikimedia Commons

  8. Evolutionary continuity of life cells Archaea Bacteria Eukaryotes Most recent common ancestor of all life cells

  9. The DNA Theory Omnis DNA e DNA "Every DNA strand originates from a preexisting complementary DNA strand, by DNA replication.” DNA sketch from Wikimedia Commons

  10. Evolutionary continuity of life DNA Archaea Bacteria Eukaryotes Most recent common ancestor of all life DNA

  11. What we’ve done • DNA replication • Each strand is the template for a new strand • Each new dsDNA has one old strand and one new strand • DNA’s evolutionary continuity • like cells, all DNA is copied from existing DNA • All DNAs are descended in a lineage from the first DNA.

  12. ? Coming up.... Lecture 1E • What makes a DNA sequence a gene?

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