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Class Powerpoint Slides-Microevolution Part 1

Test your knowledge of macroevolution with this quiz covering the origin of species, reproductive barriers, speciation processes such as allopatric and sympatric speciation, adaptive radiation, coevolution, and the Red Queen Hypothesis. Delve into the fascinating world of species formation and evolution.

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Questions and Answers

What is microevolution?

Change in the frequencies of genotypes in a population

According to Ernst Mayr, what is a species?

A group of potentially interbreeding natural populations that are reproductively isolated from other such groups

Which of these are prezygotic barriers that prevent mating?

all of the above

What type of barrier is reduced hybrid fertility?

<p>Postzygotic barrier</p> Signup and view all the answers

Can species interbreed if a barrier to gene flow is established?

<p>It's possible, but not certain, they could still interbreed.</p> Signup and view all the answers

What is the process of new species formation through geographic isolation called?

<p>Allopatric speciation</p> Signup and view all the answers

What type of barrier is mechanical isolation?

<p>a physical incompatibility between reproductive organs of two organisms</p> Signup and view all the answers

What is the term for barriers that prevent mating from occurring?

<p>Prezygotic barriers</p> Signup and view all the answers

What term describes the process of rapid evolution of many species from a single ancestor?

<p>Adaptive radiation</p> Signup and view all the answers

What is the Red Queen Hypothesis related to?

<p>Coevolution</p> Signup and view all the answers

What is the most prevalent form of speciation?

<p>Allopatric speciation</p> Signup and view all the answers

What type of speciation is common in plants and occasional in animals?

<p>Sympatric speciation by polyploidy</p> Signup and view all the answers

What type of speciation involves the evolution of many new, diverse species from a common ancestor under new environmental conditions?

<p>Adaptive Radiation</p> Signup and view all the answers

What type of polyploidy involves chromosome duplication in a single species?

<p>Autopolyploidy</p> Signup and view all the answers

What is the Dobzhansky–Muller model primarily concerned with?

<p>Reproductive Isolation and Genetic Divergence</p> Signup and view all the answers

In sympatric speciation by behavioral change in animals, what leads to genetic isolation?

<p>Parents separating into new subpopulations in the same region</p> Signup and view all the answers

What is the term for the process of rapid evolution of many species from a single ancestor under new environmental conditions?

<p>Adaptive Radiation</p> Signup and view all the answers

What type of speciation involves species arising from a connected population?

<p>Sympatric speciation</p> Signup and view all the answers

What is the term for the mutual evolutionary influence between two species occurring in the same environment?

<p>Coevolution</p> Signup and view all the answers

What is the most prevalent form of speciation?

<p>Allopatric speciation</p> Signup and view all the answers

In sympatric speciation, what is the common result of polyploidy in plants?

<p>Autopolyploidy</p> Signup and view all the answers

What is the Dobzhansky-Muller model about?

<p>Incompatibility of alleles in subdivided populations</p> Signup and view all the answers

What is the result of sympatric speciation by behavioral change in animals?

<p>No gene flow with the original population</p> Signup and view all the answers

What is the main cause of reproductive isolation in sympatric speciation by polyploidy in plants?

<p>Mistake during cell division</p> Signup and view all the answers

What is the result of allopatric speciation?

<p>Gene flow is cut off</p> Signup and view all the answers

What is the distinguishing feature of autopolyploidy in sympatric speciation?

<p>Chromosome duplication in a single species</p> Signup and view all the answers

What is the outcome of allopatric speciation in Hawaiian Drosophila?

<p>Reproductive isolation and genetic divergence</p> Signup and view all the answers

What is the primary cause of sympatric speciation by polyploidy in animals?

<p>Combining chromosomes of two different species</p> Signup and view all the answers

What is the common result of sympatric speciation by behavioral change in animals?

<p>No gene flow with the original population</p> Signup and view all the answers

True or false: Allopatric speciation can occur when a part of a population is isolated due to a geographic barrier and establishes a new population.

<p>True</p> Signup and view all the answers

True or false: In allopatric speciation, gene flow continues between the separated populations.

<p>False</p> Signup and view all the answers

True or false: Sympatric speciation by polyploidy is more common in animals than in plants.

<p>False</p> Signup and view all the answers

True or false: The Dobzhansky-Muller model involves the fixation of incompatible alleles at different loci in independently evolving lineages.

<p>True</p> Signup and view all the answers

True or false: Adaptive radiation refers to the evolution of a few specialized species from a common ancestor under stable environmental conditions.

<p>False</p> Signup and view all the answers

Allopatric speciation occurs when a physical barrier separates a population, leading to genetic isolation and divergence of gene pools.

<p>True</p> Signup and view all the answers

Sympatric speciation can occur without geographic barriers, often through polyploidy in plants or behavioral changes in animals.

<p>True</p> Signup and view all the answers

Adaptive radiation refers to the evolution of many new, diverse species from a common ancestor under new environmental conditions.

<p>True</p> Signup and view all the answers

The Red Queen Hypothesis is related to the coevolutionary arms race, for example between hosts and parasites.

<p>True</p> Signup and view all the answers

The term 'microevolution' refers to the change in frequencies of genotypes in a population.

<p>True</p> Signup and view all the answers

Allopatric speciation involves the evolution of many new, diverse species from a common ancestor under new environmental conditions

<p>False</p> Signup and view all the answers

Sympatric speciation can only occur in animals, not in plants

<p>False</p> Signup and view all the answers

Prezygotic barriers prevent mating from occurring, while postzygotic barriers operate after mating occurs

<p>True</p> Signup and view all the answers

Reduced hybrid fertility is a type of prezygotic barrier

<p>False</p> Signup and view all the answers

Allopatric speciation involves the evolution of many new, diverse species from a common ancestor under new environmental conditions

<p>False</p> Signup and view all the answers

Reduced hybrid fertility is a type of prezygotic barrier

<p>True</p> Signup and view all the answers

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