Speciation & Population Genetics

Darwin's Finches became separate species due to

• Geographic isolation

• Temporal Isolation

• Behavioral Isolation

• Postzygotic Isolation

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A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again. What type of reproductive barrier is this?

• behavioral isolation
• temporal isolation 
• gametic isolation
• geographic isolation 

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The term for the formation of new and distinct species over the course of evolution is...

• speciation

• biological species concept

• reproductive barrier

• natural selection

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What is a species? 

• A group of organisms that can mate with each other and produce fertile offspring. 
• A group of organisms that can mate and produce offspring even if those offspring are infertile.
• A group of organisms that genetically are very different from each other. 
• Indivual organisms that live in the same environment. 

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The change in the genetic make up of a population is called...

• Population
• Random mating
• Evolution
• None of these

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What is founder effect?

• Any change in the allelic frequencies in a population that is due to chance
• ›A small sample of a population settles in a location separated from the rest of the population
•   The process in which humans select for or against particular features in organisms
• ›Members of one sex choose mates with particular features

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What is genetic drift?

• The movement of genes in/out of a population
• A small, random change in the DNA
• Any change in the allelic frequencies in a population that is due to chance
• ›The process in which humans select for or against particular features in organisms

What type of selection is this?

• Directional Selection
• Stabilizing Selection
• Disruptive Selection
• Natural Selection

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What type of selection is this?

• Directional Selection
• Stabilizing Selection
• Disruptive Selection
• Natural Selection

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What type of selection is this?

• Directional Selection
• Stabilizing Selection
• Disruptive Selection
• Natural Selection

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