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Question: a population of marmots in the sierras is polymorphic for...

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A population of marmots in the Sierras is polymorphic for the Fatso gene that controls fat metabolism. F has two co-dominant alleles, F and f. FF homozygotes accumulate large amounts of fat, making them more likely to survive the winter hibernation. However, they run slower than other marmots and succumb to predation by hawks with greater frequency. ff homozygotes are very agile and successful at avoiding predators, but they accumulate less fat and are more likely to die of starvation in winter or early spring. Ff heterozygotes are intermediate in both phenotypes, and have the highest overall fitness. The relative fitness is therefore 1 for Ff, 0.8 for FF, and 0.7 for ff. The frequency of FF is 36%, Ff is at 48%, and ff is at 16%.

(5 points) What is the mean individual fitness in the population?

(10 points) What will be the frequency of the f allele be in the next generation?

(3 points) What will be the frequency of heterozygotes in the next generation (assuming random mating)?

(2 points) In this example is natural selection stabilizing, directional, balancing, or disruptive? (circle one).

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