Question

Samples of brook trout from two mountain streams yielded the following data for a polymorphism for restriction fragment length (3.3-, 3.9-, 4.1-kilobases) at the gene encoding the enzyme alcohol dehydrogenase.

Population 1 Population 2

3.3-kb homozygotes 49 3.3-kb homozygotes 4

4.1-kb homozygotes 9 3.9-kb homozygotes 64

3.3-/4.1-kb homozygotes 42 3.3-/3.9-heterozygotes 32

Show your work as best possible in the space provided.

(a) [4 pts] What are the allele frequencies in each population?

(b) [3 pts] Are the populations at Hardy-Weinberg equilibrium?

(c) [3 pts] What effect would migration of salmon from population 2 into the river where population 1 lives have on the allele frequencies in the progeny of population 1?

Samples of brook trout from two mountain streams yielded the following data for a polymorphism for restriction fragment length (3.3-, 3.9-, 4.1-kilobases) at the gene encoding the enzyme alcohol dehydrogenase.

		Population 1			Population 2
	3.3-kb homozygotes			49		3.3-kb homozygotes	4
	4.1-kb homozygotes			9		3.9-kb homozygotes	64
	3.3-/4.1-kb homozygotes			42		3.3-/3.9-heterozygotes	32

a) What are the allele frequencies in each population?

b) Are the populations at Hardy-Weinberg equilibrium?

c) What effect would migration of salmon from population 2 into the river where population 1 lives have on the allele frequencies in the progeny of population 1?

Answer 1

Answer:

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