Flexbook Chp. 10 - Evolution
Terms in this set (43)
The process by which a single species evolves into many new species to fill available niches.
A version of a gene in a population of a species.
How often an allele occurs in a gene pool relative to the other alleles for that gene.
A type of speciation resulting from geographical isolation followed by evolution of traits that prevent interbreeding.
Structures that are similar in unrelated organisms; structures that evolved to do the same job but were not inherited from a common ancestor.
Traits an organism develops during it own lifetime; these traits can not be passed to offspring.
Humans choose which animals are allowed to reproduce and therefore controll the change in that organism's traits; the method used to create domestic species.
The study of how and why plants and animals live where they do.
When a population suddenly gets much smaller, many times by a natural disaster.
A branching diagram showing the shared characteristics originating in a common ancestor between a number of species.
A type of evolution that often involves species that are in a symiotic relationship where as one species changes the other species must change in order to adapt.
The study of the similarities and differences in the structures of different species.
The study of similarities and differences in the early development (pre-hatching or pre-delivery) of different species.
The comparision of DNA to show similarities among sequences to establish evidence of a common ancestor.
Organisms that are not closely related independently evolve similar traits as a result of having to adapt to similar environments.
When one of the two extreme phenotypes is selected forand shifts the distribution toward the extreme.
When phenotypes in the middle of the range are selected against; results in two overlapping phenotypes.
The change in inheritied traits in a population over time; the change in allele frequencies over time.
An organism's relative ability to survive and produce fertile offspring.
When a few individuals start a new population
The migration of individuals into or out of a population that have a significant effect on allele frequency.
All the genes of all the members of a population; this includes all the different alleles for a gene that exist in a population.
A random change in allele frequencies that occurs in a small population that results from either the bottleneck effect or the founder effect
The different traits in individuals of a population.
The genetic combination of alleles that will determine the phenotype.
A model of timing of evolution in which the geologic and climatic conditions are stable resulting in long periods of little changes.
The founding principle of population genetics; a mathematical way to determing the allele frequencies of a population and show if the population is evolving.
Structures that are similar in related organisms because they were inherited from a common ancestor; these structures may or may not have the same function in the descendants.
Changes that occur over geologic time that leads to speciation.
A change in species over a relatively short amount of time that leads to variation within a population or species.
Movement from one part of something to another. Seasonal movement of animals from one region to another.
A change in DNA of a gene that creates new variations in a gene pool.
The differences in fitness (survival and reproductive rates) among members of a population; The environment determines which variations are most useful .
Scientists who find and study fossils to provide evidence that evolution has occurred.
The observable trait of an organism.
The science that focuses on how allele frequency changes over time in groups; a combination of evolutionary theory and Mendelian genetics.
A model of the timing of evolution geologic and climatic conditions are changing and evolution occurs quickly in rapid bursts.
The differences between the phenotypes of males and females of the same species.
The process by which a new species evolves.
A group of organisms that can breed and produce fertile offspring in nature.
When phenotypes at both extremes of the phylogenic distribution are selected against.
When speciation occurs without geographic isolation.
Structures that have become reduced in size and are no longer used due to evolution.
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