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Mechanisms of Evolution
Mechanisms of Evolution

... • Some alleles are passed on more than others by chance ...
Evolution Fill
Evolution Fill

...  Individual or species contains a _______________ of the normal set of c’somes  Caused by mistakes during cell _______________  May result in immediate reproductive isolation  Speciation Rates  Rate at which new species arise  Gradualism  _______________ change of adaptations; Ex: sea lilies ...
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Biology 3 Study Guide – Exam #3
Biology 3 Study Guide – Exam #3

... the process of transcription the differences between DNA and RNA the different roles of RNA the nature of the genetic code what is meant by the term “mutation” the process of translation ...
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... equilibrium. (genetic equilibrium = no change) • Six processes of microevolution (smallscale changes in a population's allele frequencies) prevent genetic equilibrium: ...
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Hardy Weinberg Equilibrium and Evolution

... • Microevolution: evolution on the smallest scalea generation to generation change in the frequencies of alleles within a population • Hardy Weinberg Equilibrium: populations that do not undergo change to their gene pools are not presently evolving – frequency of alleles in that gene pool are consta ...
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Mechanisms of Evolution

... What drives this ‘speciation’? ISOLATING MECHANISMS • Behavioral• Geographical• Temporal- ...
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Worksheet Chapter 5.1

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Untitled

... Sexual selection- A form of natural selection in which individuals with certain characteristics are more likely than other individuals to obtain mates. Intrasexual selection- When some species secondary sex structures may be used to compete with members of the same sex for a partner. Intersexual sel ...
Species PwrPnt
Species PwrPnt

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230-Evolution III

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Natural Selection and Specation

... • Do not possess allele IB therefore cannot be B or AB blood groups • Isolation for over 50,000 years means limited gene flow • Increased genetic flow has lead this to change ...
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Patterns of Evolution

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reproductively separated

... • Directional- favours one extreme of the phenotype; environmental change • Disruptive- favours both extremes of the phenotype; an environmental factor takes 2 or more distinct forms (e.g. temperature)- most important in bringing about evolutionary change. Environmental factors affect the probabilit ...
Chapter 14 Review pages 316
Chapter 14 Review pages 316

... 1. Darwin was familiar with the works of all of the following except: a) Mendel 2. Which of the following is needed for a new species to form: d) reproductive isolation 3. Farmers change the gene pool of a population by: c) artificial selection 4. The source of random variation on which natural sele ...
MECHANISMS OF EVOLUTION
MECHANISMS OF EVOLUTION

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Evolution of Populations
Evolution of Populations

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Gene pool

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Evolution and Classification Review
Evolution and Classification Review

... • Those that are better suited to their environment (better phenotypes or physical characteristics) survive and reproduce successfully ...
Evolution Study Guide Part 2
Evolution Study Guide Part 2

... These mutations can be neutral (no effect), negative (possible disease), or beneficial. Mutations are important for evolution only if they are mutations in the germ cells because these genes pass onto future generations. 2. Genetic Recombination and Sexual Reproduction is the most common way of gene ...
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Evolution of Populations

... Relative (allelic) frequency - the percentage of a particular allele (trait) in a gene pool. Natural Selection- In nature, unequal ability to survive and reproduce Artificial Selection- Mankind “selects” for desired traits ...
Evolution Terms to Know
Evolution Terms to Know

... D. individuals. E. chromosomes. 7. The Darwinian fitness of an individual is measured most directly by A. the number of its offspring that survive to reproduce. B. the number of “good genes” it possesses. C. the number of mates it attracts. D. its physical strength. E. how long it lives. 8. Which of ...
Exam 2 - philipdarrenjones.com
Exam 2 - philipdarrenjones.com

... That the two organisms in question attempt to mate That the two organisms in question successfully mate and produce fertile offspring ...
Ch 17 Evolution of Populations
Ch 17 Evolution of Populations

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< 1 ... 1930 1931 1932 1933 1934 1935 1936 >

Microevolution

Microevolution is the change in allele frequencies that occur over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow, and genetic drift. This change happens over a relatively short (in evolutionary terms) amount of time compared to the changes termed 'macroevolution' which is where greater differences in the population occur.Population genetics is the branch of biology that provides the mathematical structure for the study of the process of microevolution. Ecological genetics concerns itself with observing microevolution in the wild. Typically, observable instances of evolution are examples of microevolution; for example, bacterial strains that have antibiotic resistance.Microevolution over time leads to speciation or the appearance of novel structure, sometimes classified as macroevolution. Macro and microevolution describe fundamentally identical processes on different scales.
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