Population Genetics quiz PDF

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These are some answers to quizzes Professor True posted...

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Elianny Moronta Espinal

Course

-BIO 201.30 Fundamentals of Biology: Organisms to Ecosystems Summer 2017 Test Population Genetics Concept Quiz Started 6/11/17 1:23 AM Submitted 6/11/17 1:43 AM Status Completed Attempt Score 2 out of 10 points Time Elapsed 19 minutes out of 20 minutes Results All Answers, Submitted Answers, Correct Answers Displayed

Question 1

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0 out of 1 points

In a population of a mouse species, there are only two alleles at a locus causing variation in fur color, F and f. The frequency of FF is 0.60 and the frequency of ff is 0.20. What is the frequency of Ff? Selected Answer: Answers:

C.

0.2 4 A.

0.6 0 B.

0.3 6 C.

0.2 4 D.

0.2 0 E.

0.0 4

Question 2

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0 out of 1 points

If an allele is neutral, _______________. Selected Answer: Answers:

E.

It does not affect a phenotypic trait A.

It is only affected by stabilizing selection B.

It will be less likely than other genes to survive a population bottleneck C.

It will contribute to the negative effects of inbreeding D.

It is not affected by natural selection E.

It does not affect a phenotypic trait

Question 3

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0 out of 1 points

If non-random mating is occurring in a population, which of the following is true? Natural selection ins not expected to occur in the population Answer Migration will not affect the genotype frequencies s:

Sexual selection may not be occurring in the population Natural selection ins not expected to occur in the population The population is expected to be at HardyWeinberg equilibrium The population is expected to undergo Muller's Ratchet

Question 4



0 out of 1 points

What is an advantage that an asexual population with all females has over an otherwise similar sexual population with 50% females, 50% males? Selected Answer: Answers:

B.

Removal of mutations by recombination A.

A lower rate of formation of deleterious mutations B.

Removal of mutations by recombination C.

Fewer chromosomes that lack deleterious mutations D.

Increased competition for mates E.

A higher rate of reproduction

Question 5

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0 out of 1 points

In a population at Hardy-Weinberg equilibrium with two alleles at the A locus, A1 and A2, if the frequency of A1 is 0.2, what is the expected frequency of A2A2 homozygotes? Selected Answer: Answers:

A.

0.0 4 A.

0.0 4 B.

0.4 0

C.

0.6 4 D.

0.8 0 E.

0.9 6

Question 6



1 out of 1 points

There is a population of green snakes with 20 yellow-striped snakes (genotype: GG), 40 yellow-striped snakes (genotype: Gg), and 40 orange-striped snakes (genotype: gg). What is the frequency of heterozygotes at this locus in the population? Selected Answer: Answers:

C.

0.4 0 A.

0.2 5 B.

0.3 0 C.

0.4 0 D.

0.7 0 E.

0.7 5

Question 7



0 out of 1 points

If the number of individuals in a population of a diploid species is 5,000 then the number of alleles in that population at a gene locus which is not on a sex chromosome is: Selected Answer: Answers:

B.

2,50 0 A.

1,00 0 B.

2,50 0 C.

5,00 0

D.

10,0 00 E.

20,0 00

Question 8



1 out of 1 points

Allele frequency data were gathered from four populations of milkweeds at four enzyme loci. The loci are all on different chromosomes. The table above indicates whether each of the four populations were found to be at Hardy-Weinberg equilibrium at each of the four loci. Given this data, which of the following statements is correct? No table is included in this question--please disregard and select the correct answer A. Selected Answer:

A.

Population 4 appears to have experienced a demographic event such as admixture, migration, or bottleneck

Answers:

A.

Population 4 appears to have experienced a demographic event such as admixture, migration, or bottleneck B.

A locus at or near the Aldolase locus in population 2 appears to be experiencing natural selection C.

A locus at or near the Lyase locus in population 3 appears to be experiencing natural selection D.

A locus at or near the Methylase locus in population 4 appears to be experiencing natural selection E.

Population 3 is not likely to be undergoing evolution at this time

Question 9



0 out of 1 points

Which of the following is true of neutral alleles? Selected Answer:

D.

They do not affect the expression of phenotypes

Answers:

A.

They will eventually either go to fixation (100%) or go to extinction (0%) B.

If they increase in frequency one generation, they are more likely to decrease in frequency in the next generation C.

They can be subject to stabilizing, directional, or disruptive selection D.

They do not affect the expression of phenotypes E.

They do not get inherited

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Question 10

0 out of 1 points

Which of the following, if present in a population, would be expected to lead to departures from HardyWeinberg expectations of genotype frequencies? Selected Answer: Answers:

A.

Random mating A.

Random mating B.

Inbreeding C.

A very large population size D.

An extremely low mutation rate E.

Lack of migration from other populations Sunday, June 11, 2017 1:43:03 AM EDT...