This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

12
This video is licensed under a Creative Commons Attribution- Share Alike 3.0 Unported license. Useful Genetics Professor Rosie Redfield The University of British Columbia

description

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 - PowerPoint PPT Presentation

Transcript of This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

Page 1: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

Useful GeneticsProfessor Rosie Redfield

The University of British Columbia

Page 2: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

2

• Describe DNA replication• Explain the role of DNA replication

in the history of DNA

The history of DNA

a) DNA replication

b) The Cell Theory in biology

c) A ‘DNA Theory’ for genetic information

d) DNA’s evolutionary continuity

Lecture 1D

Outline:

Learning objectives:

??

Page 3: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

3

DNA replication

Image from Wikimedia Commons

Page 4: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

4

DNA replication

Image from Wikimedia Commons

Page 5: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

5

DNA replication

Page 6: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

6

Evolutionary continuity of life

Eukaryotes

Bacteria

Archaea

Most recent common ancestor of all life

Page 7: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

7

The Cell Theory in biology

Omnis cellula e cellula

"Every cell originates from another existing cell like it, by cell division.”

Virchow’s cell drawings from Wikimedia Commons

Page 8: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

8

Evolutionary continuity of life

Eukaryotes

Bacteria

Archaea

Most recent common ancestor of all life

cells

cells

Page 9: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

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

Page 10: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

10

Evolutionary continuity of life

Eukaryotes

Bacteria

Archaea

Most recent common ancestor of all life

DNA

DNA

Page 11: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

11

What we’ve done

a) DNA replication• Each strand is the template for

a new strand• Each new dsDNA has one old

strand and one new strand

b) DNA’s evolutionary continuity• like cells, all DNA is copied

from existing DNA

• All DNAs are descended in a lineage from the first DNA.

Page 12: This video is licensed under a Creative Commons Attribution-Share Alike 3.0 Unported license.

12

Coming up....

What makes a DNA sequence a gene?

Lecture 1E

?