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Ch. 17

Did You Study?

TermDefinition
Adaptive Radiation When one lineage rapidly diversifies into several new species
Evolutionary Tree A diagram that shows which physical traits are shared in one species to another
Founder Effect When a group of species within a population decide to make their own population
Genetic Equillibrium When the allele frequency for a trait doesn't change in a gene pool
Microevolution When the allele frequency for a trait does change in a gene pool
Phylogeny The evolutionary history of a species
Allele Frequency The amount of an allele that a population has
Bottleneck A great reduction in population size
Cladogram A branching diagram that tells how different species are related
Coevolution When the evolution of one species affects the evolution of another
Derived Trait A Character present in a group under consideration , but not in any of the group's ancestors
Exaptation When a species adapts for a whole different reason
Extinct A species that has died away because it couldn't adapt to its environment
Gene Flow The movement of alleles between populations
Gene Pool All of the Alleles of genes within a population
Genetic Drift Change of an allele's frequency over time
Inbreeding Breeding between close relatives
Lethal Mutation A mutation that changes phenotype to a point that leads to death
Macroevolution Evolution on a larger scale
Population A large group of a species that live in a certain area that breed with each other
Reproductive Isolation The end of gene flow between populations
Sexual Selection A form of natural selection where the species with the best traits are chosen to reproduce with
Speciation A process in which new species arise through isolation from a larger population
Stasis When a lineage that has persisted for million of years has had very little evolutionary pattern
Created by: moiz.yousufi86
 

 



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