question archive Open a web browser and go to  https://faculty

Open a web browser and go to  https://faculty

Subject:BiologyPrice: Bought3

  1. Open a web browser and go to  https://faculty.utrgv.edu/matthew.terry/

This website provides a simulation of allele frequency changes due to genetic drift and natural selection for a two allele system. (This site is most compatible with Google Chrome or Firefox)

a.    Perform ten simulations using the default settings for allele frequency and population size (A allele Freq = 0.5, Population = 200) and the number of Generations set to 200. This can be done by pushing the button 10 times. Each new simulation will be graphed in a series of new colors.

How many of the simulations fixed the A allele (reached the top of the graph)?

                       

 

 

 

How many of the simulations lost the A allele completely (reached the bottom of the graph)?

                       

 

 

 

 

How many of the simulations fixed neither the A or the a allele?

 

 

 

 

b.    Clear the chart and complete ten more simulations. Were your results the same? Why or why not?

 

 

 

 

 

 

c.    Clear the chart, change the population size to 1000 (N=1000) and run ten more simulations.

Were your results significantly different than in 1a and 1b? (Hint: What's the difference between short term allele frequency fluctuations?)

                       

 

 

 

 

 

 

d.    Clear the chart, change the population size to 100,000 and run ten more simulations.

What do the results look like now and why? (Hint: What evolutionary force is at work here and how does its influence change as populations get larger)

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