Bozeman Science 📤 6 years ago 2011-06-24
008 - Reproductive Isolation and Speciation
Paul Andersen explains how reproductive isolation can eventually lead to speciation. Three main barriers to gene flow are included: geographic, pre-zygotic and post-zygotic. Both allopatric and sympatric speciation are discussed. A brief discussing of polyploidy and punctuated equilibrium are also included.
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All of the images are licensed under creative commons and public domain licensing:
Davison, Angus; Chiba, Satoshi; Barton, Nicholas; Clarke, Bryan. "Speciation and Gene Flow Between Snails of Opposite Chirality." PLOS Biology, September 2005.
"File:Drosophila Speciation.svg." Wikipedia, the Free Encyclopedia. http://en.wikipedia.org/wiki/File:Drosophila_speciation.svg.
"File:Eastern American Toad.jpg." Wikipedia, the Free Encyclopedia. http://en.wikipedia.org/wiki/File:Eastern_american_toad.jpg.
"File:Great Wall of China July 2006.JPG." Wikipedia, the Free Encyclopedia. http://en.wikipedia.org/wiki/File:Great_Wall_of_China_July_2006.JPG.
File:Hamburger Sandwich.jpg, n.d. http://commons.wikimedia.org/wiki/File:Hamburger_sandwich.jpg.
"File:Loxodontacyclotis.jpg." Wikipedia, the Free Encyclopedia.http://en.wikipedia.org/wiki/File:Loxodontacyclotis.jpg.
"File:Polyploidization.svg." Wikipedia, http://en.wikipedia.org/wiki/File:Polyploidization.svg.
"File:Punctuated-equilibrium.svg." Wikipedia, http://en.wikipedia.org/wiki/File:Punctuated-equilibrium.svg.
"File:Reef0484.jpg." Wikipedia, http://en.wikipedia.org/wiki/File:Reef0484.jpg.
"File:Salad Platter.jpg." Wikipedia, http://en.wikipedia.org/w/index.php?title=File:Salad_platter.jpg&oldid=404731827.
"File:Speciation Modes.svg." Wikipedia, . http://en.wikipedia.org/wiki/File:Speciation_modes.svg.
"File:Stephen Jay Gould by Kathy Chapman.png." Wikipedia, http://en.wikipedia.org/wiki/File:Stephen_Jay_Gould_by_Kathy_Chapman.png.
"File:Tympanoctomys Barrerae.jpg." http://en.wikipedia.org/wiki/File:Tympanoctomys_barrerae.jpg.
"File:Wheat close-up.JPG." http://en.wikipedia.org/wiki/File:Wheat_close-up.JPG.
Jimpaz. Anaxyrus Fowleri, April 25, 2010. Own work. http://commons.wikimedia.org/wiki/File:FowlersToad.JPG.
Lascorz, Juan R. English: Mule in Moriles, Córdoba (Spain)., July 2009. Own work. http://commons.wikimedia.org/wiki/File:09.Moriles_Mula.JPG.
Marlin, Bruce. Siberian Elm Ulmus Pumila. Morton Arboretum Accession 325-70-4., July 12, 2007. Own work: http://cirrusimage.com/tree_Siberian_Elm.htm. http://commons.wikimedia.org/wiki/File:Ulmus_pumila.jpg.
Rae, Alastair. Sturnella Magna, February 25, 2009. originally posted to Flickr as Eastern Meadowlark. http://commons.wikimedia.org/wiki/File:Sturnella_magna_-Mexico-8.jpg.
Unknown. English: A Sperm Cell Fertilizing an Egg Cell, [object HTMLTableCellElement]. http://pdimages.com/web9.htm. http://commons.wikimedia.org/wiki/File:Sperm-egg.jpg.
USA, Kevin Cole from Pacific Coast. Western Meadowlark (Sturnella Neglecta). Taken on Turri Road from the Car with a Canon 500mm f/4L and 40D. Kirk Window Mount and Wimberley Head., March 13, 2008. Western Meadowlark (Sturnella neglecta) The State bird for Kansas, Montana, Nebraska, North Dakota, Oregon and Wyoming. http://commons.wikimedia.org/wiki/File:Western_Meadowlark.jpg.
:Etosha elefant.jpg." http://hi.wikipedia.org/wiki/%E0%A4%9A%E0%A4%BF%E0%A4%A4%E0%A5%8D%E0%A4%B0:Etosha_elefant.jpg.
"File:Wheat close-up.JPG." Wikipedia, the Free Encyclopedia. Accessed November 9, 2013. http://en.wikipedia.org/wiki/File:Wheat_close-up.JPG.
Jimpaz. Anaxyrus Fowleri, April 25, 2010. Own work. http://commons.wikimedia.org/wiki/File:FowlersToad.JPG.
Lascorz, Juan R. English: Mule in Moriles, Córdoba (Spain)., July 2009. Own work. http://commons.wikimedia.org/wiki/File:09.Moriles_Mula.JPG.
Marlin, Bruce. Siberian Elm Ulmus Pumila. Morton Arboretum Accession 325-70-4., July 12, 2007. Own work: http://cirrusimage.com/tree_Siberian_Elm.htm. http://commons.wikimedia.org/wiki/File:Ulmus_pumila.jpg.
Rae, Alastair. Sturnella Magna, February 25, 2009. originally posted to Flickr as Eastern Meadowlark. http://commons.wikimedia.org/wiki/File:Sturnella_magna_-Mexico-8.jpg.
Unknown. English: A Sperm Cell Fertilizing an Egg Cell, [object HTMLTableCellElement]. http://pdimages.com/web9.htm. http://commons.wikimedia.org/wiki/File:Sperm-egg.jpg.
USA, Kevin Cole from Pacific Coast. Western Meadowlark (Sturnella Neglecta). Taken on Turri Road from the Car with a Canon 500mm f/4L and 40D. Kirk Window Mount and Wimberley Head., March 13, 2008. Western Meadowlark (Sturnella neglecta) The State bird for Kansas, Montana, Nebraska, North Dakota, Oregon and Wyoming. http://commons.wikimedia.org/wiki/File:Western_Meadowlark.jpg.
"चित्र:Etosha elefant.jpg."