Ch. 14 Study Guide.docx - Chapter 14 Nonadaptive Evolution...

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Chapter 14: Nonadaptive Evolution and Speciation – Study Guide TYPE IN YOUR ANSWERS USING A DIFFERENT COLOR! 81 points total converted to 100 point scale in gradebook. Complete and submit via Ch. 14 Dropbox Define: (1 point each = 14) [POPULATION GENETICS] The study of the genetic makeup of populations and how genetic composition changes [GENE POOL] total collection of alleles in a population [ALLELE FREQUENCY] the relative proportion of an allele in a population [ NONADAPTIVE EVOLUTION] [GENETIC DRIFT] change in allele frequencies between generations that occurs purely by chance [FOUNDER EFFECT] a type of genetic drift in which a small number of individuals leaves one population and establishes a new one [BOTTLENECK EFFECT] type of genetic drift that occurs when a population is suddenly reduced to a small number of individuals and alleles are lost from the population as a result. [GENE FLOW] movement of alleles from one population to another, which may increase the genetic diversity of a population [INBREEDING] Mating between closely related individuals [INBREEDING DEPRESSION] high frequency of homozygous individuals possessing harmful recessive [ HARDY-WEINBERG PRINCIPLE] [BIOLOGICAL SPECIES CONCEPT] Different species cannot mate because they are reproductively isolated [REPRODUCTIVE ISOLATION] mechanisms that prevent mating (and therefore gene flow) between members of different species [SPECIATION] When one population (species) genetically diverges over time to form two species Answer.

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