3. Palumbi and Baker studied the population structure of humpback whales in the

Question

3. Palumbi and Baker studied the population structure of humpback whales in the north Pacific, but also gathered data from the North Atlantic. Use their data below from the actin locus (a cytoskeletal protein) to calculate Fsr between California and the North Atlantic. You must show all your work for full credit. 5 California (n-30) North Atlantic (n-42) 10 15 15 25 4. What are demographically-independent populations? Using the answer from question 3, explain why or why not populations in California and the North Atlantic are demographically independent? What caveats must you consider when interpreting genetic data like these?

Explanation / Answer

4. Demographically independent populations are those populations whose population growth rate depend largely on local birth and death rates rather than on immigration.rates rather than on immigration.

FST measures the probability of identical by decent or decrease in heterozygosity. FST=0 means both the population actually came from same ancestor population. So, the populations in California and North atlantic are not demographically independent.

Actin is a very conserved protein. It is unlikely that Actin will show significant amonut of change in course of generation. This kind of interpretation should be done based on more than one genes.

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