Bio week 10
Bio week 10 BIOLOGY 1114 - 0010
Popular in Biological Sciences: Form, Function, Diversity, and Ecology
Popular in Biology
This 0 page Class Notes was uploaded by Sean Bhatnagar on Sunday November 1, 2015. The Class Notes belongs to BIOLOGY 1114 - 0010 at Ohio State University taught by Staff in Fall 2015. Since its upload, it has received 11 views. For similar materials see Biological Sciences: Form, Function, Diversity, and Ecology in Biology at Ohio State University.
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Date Created: 11/01/15
Biology Week 10 Models of Speciation Allopatry different fatherland 0 Non overlapping distributions By vicariance By dispersal Sypatry same fatherland o Overlapping distributions Paraptry through fartherland o Geographically contiguous 0 Isolation by distance Allopatric Speication A population is subdivided during the separation mutations arise in each subset such that each subset changes from the original in terms of morphology behavior etc Disperal Alloparty that arises because a subset of the population disperse to a new isolated place 0 Peripatric speciation or founder effect Subsets differentiate while separated 0 Small size of founding population spurs change genetic drift Parapatric speciation o Speciation that occurs when the groups that evolve to be separate species are geographic neibors they are in diffent areas but the areas are next to each other and individuals can move between the areas Gene ow Sympatric Speciation speciation without physical or spatial barrier Sexual Selection arises from difference in mating success A component of natural selection 2 basic models Copulation and Spawning Copulation Requiers individuals to recognize and encounter conspeci cs of the appropriate sex Transmitting gametes Spawning Coordination of members of a population with respect to timing of spawning
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