BIO152H5 Study Guide - Final Guide: Gene Flow, Microevolution, Chromosome
Document Summary
Bio 152 fall 2014 final exam study guide: chapter 24. Speciation can occur rapidly or slowly and can result from changes in few or many genes. Speciation is the origin of species, and is the focal point of evolutionary theory. Evolutionary theory explains how new species originate and how populations evolve. Microevolution consists of changes in allele frequency in a population over time: compare and contrast the different species concepts. Identify pros and cons for each species concept. Biological species concept: states a species is a group whose members have potential to interbreed in nature and produce viable, fertile offspring. Based on the potential to interbreed rather than on physical similarity. Species do not breed successfully with other populations. Gene flow between populations holds phenotype of a population together: limitations of biological species concept: Cannot be applied to fossils or asexual organisms including all prokaryotes. Emphasizes absence of gene flow, which can occur between distinct species (grolar bears)
