Number of pikas with each genotype Year 170/170 170/172 172/172 1998 1999 16 6 0 2000 6 6 2001 no data no data no data 2002 28 2003 4 2004 27 6 2005
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Question

 10. Use the following table to answer the questions below. Change in Genotype Frequencies for a Single Gene in a Collard Pika (Ochotona collaris)

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Note: The alleles for the gene under study are called 170 and 172. Source: Data provided by Jessie Zgurski, University of Alberta

a) Based on the 1998 data, calculate the expected frequencies of the 170 and 172 alleles.

b) Based on the 2005 data, calculate the expected frequencies of the 170 and 172 alleles.

c) Does this collard pika population appear to be at genetic equilibrium? Explain your answer. d) No individuals that were homozygous for the 172 allele were detected between 1998 and 2002. How did the 172 allele remain in the population? e) Populations of collard pika in Canada have been declining since 1995. How would you expect this to affect genetic diversity in collard pika populations?

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Number of pikas with each genotype Year 170/170 170/172 172/172 1998 1999 16 6 0 2000 6 6 2001 no data no data no data 2002 28 2003 4 2004 27 6 2005 42 9

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