Biology 1001A Lecture Notes - Lecture 19: Allopatric Speciation, Shared Resource, Reproductive Isolation
30 Apr 2015
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Document Summary
Identifies species based on whether or not they look similar to one another: problem when there"s sexual dimorphism male and female look different but are the same species. Tanya malhotra: speciation, formation of new species r. Prezygotic: don"t recognize each other, evolved differences in courtship, etc. Tanya malhotra: offspring is selected to demand more than the mother is selected to give because the mother has to give equally to all kids, why rational decisions by individuals can lead to the overexploitation of shared resources. Sexual dimorphism male and female look different. Individuals from different species can look the same even though they do not interbreed (misleading) Individuals from the same species can look different (phenotypic variation) but be able to produce viable offspring: limitations of biological species concept, problems when there"s geographical separation/ isolation. Some species never got the opportunity to encounter each other in the wild.
