BIOL 1500 Chapter Notes -Founder Effect, Genetic Drift, Xanthium
10 Apr 2014
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Document Summary
In mid 1700s carl linnaeus began task of cataloging all of nature. Linnaeus created binomial classification system for classifying species that still used today (grouped organisms according to shared traits) Named humans homo sapiens (homo- man (is the genus), sapins-meaning wise (is the species) subspecies- subdivision of species that"s not reproductively isolated -- population with unique evolutionary history. Useful in identifying boundaries between populations of similar organisms. Relatively easy to evaluate for sexually reproducing species. Cannot be applied to organisms that reproduce asexually or to fossil organisms asexual reproduction-type of reproduction in which one parent gives rise to genetically identical offspring. May not be meaningful when two populations of the same species are separated by large geographical distances. Most common definition of species used by biologists. Reproductive isolation-reproduction between two different species cannot occur due to pre-fertilization barriers and post-fertilization barriers.
