Evolution Q2 Z

What type of natural selection is this?

• Disruptive Selection

• Directional Selection

• Stabilizing Selection

• Natural Selection

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If finches with large beaks and finches with small beaks increase in a population while finches with average sized beaks decreases, which pattern of natural selection has occurred?

• Directional selection
• Disruptive selection 
• Stabilizing selection

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Robins typically lay fours eggs. If more then four eggs are produced then the baby chicks are malnourished while smaller egg numbers result in no viable (able to live) baby chicks. This is an example of

• stabalizing
• disruptive
• direction
• none of the above

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_{What type of selection?}

• Directional 
• Stabilizing
• Disruptive

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What type of selection is depicted in the picture? 

• stabilizing 
• directional 
• disruptive 
• the answer is not here

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A small population of chimpanzees lives in a habitat that undergoes no changes for a long period. How will genetic drift probably affect this population?

• It will accelerate the appearance of new traits.
• It will promote the survival of chimpanzees with beneficial traits.
• It will increase the number of alleles for specific traits.
  
•  It will reduce genetic diversity.

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A small portion of the population that is geographically isolated from the rest of the population runs the risk of decreased.

• genetic drift
• mutation rate
• natural selection
• genetic variation

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Genetic drift is more likely to happen in...

• aquatic populations

• small populations

• terrestrial populations

• older populations

Which of the following is an example of the bottleneck effect?

• Cheetah populations reach their lowest levels with reduced diversity and as they rebound are so genetically similar they appear to be inbred.

• Affected individuals with blue skin can trace their ancestry back to one of the first settlers in the region.

• The environment of a fox population changes and over time foxes who are white survive and pass on their genes to their offspring.

• Humans choose two dogs they like the characteristics of and breed them together.

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Which of the following is an example of the founder effect?

• Humans choose two dogs they like the characteristics of and breed them together.

• Affected individuals with blue skin can trace their ancestry back to one of the first settlers in the region.

• The environment of a fox population changes and over time foxes who are white survive and pass on their genes to their offspring.

• Cheetah populations reach their lowest levels with reduced diversity and as they rebound are so genetically similar they appear to be inbred.

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