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Urgent - multiple choice in Genetics

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akhl

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akhl

Joined: 30 March 2007

Posts: 5234

Posted: 06 December 2011 at 7:42am | IP Logged
Anybody with knowledge of Genetics? To help a student, I urgently need answers to this questions.

1. A heterozygote has a 10% fitness disadvantage relative to wildtype homozygotes. The mutant homozygote has a 20% fitness disadvantage. What do you predict after many generations have passed?
A) Fixation of the mutant allele
B) Loss of the mutant allele (Is this correct option)
C) A stable equilibrium maintaining both alleles
D) An unstable equilibrium with possible fixation or loss of either allele

2. Average polymorphism (heterozygosity) within a species at a particular gene region is expected to be?
A) 2
B) 1/(2N)
C) 4N (Is this correct option?)
D) 2N
E) 2N

3. The chance of coalescence of two lineages of a locus each generation is?
A) 2
B) 1/(2N) (Is this correct option?)
C) 4N
D) 2N
E) 2N

4. The average time to coalescence of two lineages is how many generations?
A) 2
B) 1/(2N)
C) 4N
D) 2N (Is this correct option?)
E) 2N

5. The divergence expected between species for a gene is?
A) 2
B) 1/(2N)
C) 4N (Is this correct option?)
D) 2N
E) 2N

6. What is the expected allele frequency in the next generation?
A) wA=wB
B) p '= pwp/w (Is this correct option?)
C) wAA<wAB>wBB
D) wA<w

7. Which represents the equilibrium value?
A) wA=wB (Is this correct option?)
B) p '= pwp/w
C) wAA<wAB>wBB
D) wA<w

8. Which represents overdominance?
A) wA=wB
B) p '= pwp/w
C) wAA<wAB>wBB (Is this correct option?)
D) wA<w

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