Natural Selection Patterns, Gene Pool & Relative Frequency

_______________ or differences exist between members of a population.

• traits

• disease

• variations

• reproduction

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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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_{What type of selection?}

• Directional 
• Stabilizing
• Disruptive

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Which of the three graphs shows stabilizing selection?

• A
• B
• C

Which of the three graphs shows disruptive selection?

• A
• B
• C

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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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What type of natural selection is this?

• Disruptive Selection
• Directional Selection
• Stabilizing Selection
• Sexy Selection

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What is the correct explanation for what is happening in this graph?

• There are a lot of average-sized beaks
• There are no beaks
• There are a lot of small beaks only
• There are a lot of small and large beaks, but not average-sized ones

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Scientists find that most feral cats in a neighborhood have whiskers about 12 cm long. After about 15 generations of stabilizing selection, what would you expect to see?

• even more cats with 12 cm long whiskers
• most cats with less than 12 cm long whiskers
• most cats with more than 12 cm long whiskers
• most cats with whiskers either less than or more than 12 cm long, very few with whiskers 12 cms 

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Human babies don't do well if they are born too small. If they are too big complications can occur during birth. Baby size should then be selected for by which method?

• stabilizing
• directional
• disruptive
• Beyonce is having twins

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