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Cellular Variation

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Published on Dec 30, 2011

052 - Cellular Variation

Paul Andersen explains how variation is created within a cell. He starts by showing how molecular variation can increase fitness at the local level. He explains how an additional chlorophyll molecule allows plants to absorb more light from the sun. He also explains how cells can vary the composition of phospholipids in their cell membrane. He explains the significance of heterozygote advantage and how gene duplication can create novel genes. The antifreeze protein evolved from a simple digestive protein.

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Creative Commons Atribution License

All of the images are licensed under creative commons and public domain licensing:
Dhatfield, Cell_membrane_detailed_diagram_4_it svg: *Cell_membrane_detailed_diagram_4 svg: *derivative work: Fosfolipide Di Membrana, 23:28 (UTC). Cell_membrane_detailed_diagram_4_it.svg. http://commons.wikimedia.org/wiki/Fil....
"File:Anopheles Albimanus Mosquito.jpg." Wikipedia, the Free Encyclopedia. Accessed April 7, 2014. http://en.wikipedia.org/wiki/File:Ano....
"File:Chlorophyll Ab Spectra-En.svg." Wikipedia, the Free Encyclopedia. Accessed April 7, 2014. http://en.wikipedia.org/wiki/File:Chl....
"File:Cold Seep Community.jpg." Wikipedia, the Free Encyclopedia. Accessed April 7, 2014. http://en.wikipedia.org/wiki/File:Col....
"File:Gene-Duplication.png." Wikipedia, the Free Encyclopedia. Accessed April 7, 2014. http://en.wikipedia.org/wiki/File:Gen....
"File:Lipid Unsaturation Effect.svg." Wikipedia, the Free Encyclopedia. Accessed April 7, 2014. http://en.wikipedia.org/wiki/File:Lip....
"File:Plagiomnium Affine Laminazellen.jpeg." Wikipedia, the Free Encyclopedia. Accessed April 7, 2014. http://en.wikipedia.org/wiki/File:Pla....
"File:Plasmodium.jpg." Wikipedia, the Free Encyclopedia. Accessed April 7, 2014. http://en.wikipedia.org/wiki/File:Pla....
"File:Sicklecells.jpg." Wikipedia, the Free Encyclopedia. Accessed April 7, 2014. http://en.wikipedia.org/wiki/File:Sic....
"File:Survival Curves for Hemoglobin Genotypes.png." Wikipedia, the Free Encyclopedia. Accessed April 7, 2014. http://en.wikipedia.org/wiki/File:Sur....
"File:Wheat Harvest.jpg." Wikipedia, the Free Encyclopedia. Accessed April 7, 2014. http://en.wikipedia.org/wiki/File:Whe....
"File:WheatFlower1.jpg." Wikipedia, the Free Encyclopedia. Accessed April 7, 2014. http://en.wikipedia.org/wiki/File:Whe....
NOAA/MBARI. Eelpout (Pachycara Sp.) on the Davidson Seamount at 2602 Meters Depth., May 20, 2002. http://www.mbnms-simon.org/other/phot.... http://commons.wikimedia.org/wiki/Fil....

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