Question 1

Multifactorial inheritance is observed in phenotypes that show typically

Accepted Answer

A)  only one discrete type. 
B)  two extremes. 
C)  continuous variation. 
D)  a higher mutation rate. 
E)  All of the choices are correct. 
A)  only one discrete type. 
B)  two extremes. 
C)  continuous variation. 
D)  a higher mutation rate. 
E)  All of the choices are correct. C

Question 2

Which of the following is true of a trait with high narrow-sense heritability?

Accepted Answer

A)  it is resistant to natural selection but not artificial selection 
B)  it has high epistatic variation 
C)  it has high dominance variation 
D)  it has large potential for evolution via selection 
E)  it is resistant to artificial selection but not natural selection 
A)  it is resistant to natural selection but not artificial selection 
B)  it has high epistatic variation 
C)  it has high dominance variation 
D)  it has large potential for evolution via selection 
E)  it is resistant to artificial selection but not natural selection D

Question 3

Explain why a population carries more genetic diversity than does an individual.

Accepted Answer

In the case of multiple alleles,the greatest number of alleles any individual can carry is 2,while many alleles can be present in the population.

Question 4

What is the role of neutral genetic drift in future evolution of humans?

Accepted Answer

A)  Significant,due to increased migration. 
B)  Significant,due to decreased mutation from environmental toxins. 
C)  Almost none,due to increased migration. 
D)  Almost none,due to assortative mating. 
E)  Almost none,because of the large population size. 
A)  Significant,due to increased migration. 
B)  Significant,due to decreased mutation from environmental toxins. 
C)  Almost none,due to increased migration. 
D)  Almost none,due to assortative mating. 
E)  Almost none,because of the large population size.

Question 5

Continuous traits are

Accepted Answer

A)  due to sex-linked genes only. 
B)  due to autosomal genes only. 
C)  qualitative in nature. 
D)  quantifiable in measurements. 
E)  the result of test-crosses only. 
A)  due to sex-linked genes only. 
B)  due to autosomal genes only. 
C)  qualitative in nature. 
D)  quantifiable in measurements. 
E)  the result of test-crosses only.

Question 6

What is the difference between phenotype frequency,genotype frequency,and allele frequency?

Accepted Answer

Phenotype frequency is the proportion of

Question 7

The founder effect may lead to a higher incidence of certain alleles than seen in large diverse populations.

Accepted Answer

A) True 
 B)False

Question 8

A cross between a tall and a short bean plant produced intermediate height in the F1 generation.When the F1 plants were crossed with plants of the original parental heights,plants with a range of heights in between the extremes were produced.The mode of inheritance is described as

Accepted Answer

A)  multifactorial. 
B)  independent assortment. 
C)  incomplete dominance. 
D)  codominance. 
E)  segregation. 
A)  multifactorial. 
B)  independent assortment. 
C)  incomplete dominance. 
D)  codominance. 
E)  segregation.

Question 9

The total genetic relatedness of two siblings is

Accepted Answer

A)  2.0 
B)  1.0 
C)  0.5 
D)  0.2 
E)  None of the choices are correct. 
A)  2.0 
B)  1.0 
C)  0.5 
D)  0.2 
E)  None of the choices are correct.

Question 10

Hardy-Weinberg equilibrium in populations is defined as conditions that produce

Accepted Answer

A)  only heterozygotes. 
B)  many lethal alleles. 
C)  genetic drift. 
D)  unchanging allele frequencies from generation to generation. 
E)  purifying selection. 
A)  only heterozygotes. 
B)  many lethal alleles. 
C)  genetic drift. 
D)  unchanging allele frequencies from generation to generation. 
E)  purifying selection.

Question 11

You have discovered a small population of a unique vole species in a single high-mountain valley.Humans decimated the population outside this valley in the last centuries to use their fur in slippers.A genotypic analysis of the remaining voles shows a high incidence of recessive lethal alleles at three loci.You have been given a grant to begin a captive breeding program with a subset of the population,in hopes that more voles can be produced and released into the wild.Explain your strategies for this project.

Accepted Answer

Capture equal numbers of male and female

Question 12

Unpredictable,chance fluctuation in allele frequency that has a neutral effect on fitness is called

Accepted Answer

A)  founder effect. 
B)  selection. 
C)  genetic drift. 
D)  mutation. 
E)  inbreeding. 
A)  founder effect. 
B)  selection. 
C)  genetic drift. 
D)  mutation. 
E)  inbreeding.

Question 13

Which of the following is true of fitness?

Accepted Answer

A)  it is defined by an individual's ability to reproduce. 
B)  it is defined by changes in population size. 
C)  it always increases over time. 
D)  it always decreases over time. 
E)  it always the same for a given genotype. 
A)  it is defined by an individual's ability to reproduce. 
B)  it is defined by changes in population size. 
C)  it always increases over time. 
D)  it always decreases over time. 
E)  it always the same for a given genotype.

Question 14

The binomial Hardy-Weinberg equation is represented by p2 + p2q2 + q2 = 1.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following is not one of the assumptions of the Hardy-Weinberg law?

Accepted Answer

A)  The population is very large. 
B)  Non-random mating occurs within the population. 
C)  Mutations in the alleles do not occur. 
D)  No migration occurs into or out of the population. 
E)  The ability of all genotypes for survival and reproduction is the same. 
A)  The population is very large. 
B)  Non-random mating occurs within the population. 
C)  Mutations in the alleles do not occur. 
D)  No migration occurs into or out of the population. 
E)  The ability of all genotypes for survival and reproduction is the same.

Question 16

The definition of allele frequency is proportion of gene copies in a whole population that are of a specific allele type;the total number of gene copies is equal to two times the number of individuals in the population.

Accepted Answer

A) True 
 B)False

Question 17

What is selection? How does it alter allele frequencies?

Accepted Answer

Selection is the process by which some i

Question 18

Brown insects living in a dark background survived in a ratio of 90/120,while the same insects in a lighter background survived in a ratio of 30/120.The ratio of relative fitness of the insects in dark backgrounds to lighter backgrounds is given as

Accepted Answer

A)  1 : 0.333. 
B)  0.40 : 0.60. 
C)  90 : 120. 
D)  1 : 0. 
E)  0.60 : 0.40. 
A)  1 : 0.333. 
B)  0.40 : 0.60. 
C)  90 : 120. 
D)  1 : 0. 
E)  0.60 : 0.40.

Question 19

List five forces that change the frequency of an allele in a population and discuss why the elimination of a deleterious recessive allele is nearly impossible.

Accepted Answer

Allele frequency is altered by genetic d

Question 20

One way scientists attempt to control confounding factors due to environmental variability is through cross-fostering.

Accepted Answer

A) True 
 B)False

Exam 11: The Eukaryotic Chromosome

Multifactorial inheritance is observed in phenotypes that show typically

Which of the following is true of a trait with high narrow-sense heritability?

Explain why a population carries more genetic diversity than does an individual.

What is the role of neutral genetic drift in future evolution of humans?

Continuous traits are

What is the difference between phenotype frequency,genotype frequency,and allele frequency?

The founder effect may lead to a higher incidence of certain alleles than seen in large diverse populations.

A cross between a tall and a short bean plant produced intermediate height in the F1 generation.When the F1 plants were crossed with plants of the original parental heights,plants with a range of heights in between the extremes were produced.The mode of inheritance is described as

The total genetic relatedness of two siblings is

Hardy-Weinberg equilibrium in populations is defined as conditions that produce

Unpredictable,chance fluctuation in allele frequency that has a neutral effect on fitness is called

Which of the following is true of fitness?

The binomial Hardy-Weinberg equation is represented by p2 + p2q2 + q2 = 1.

Which of the following is not one of the assumptions of the Hardy-Weinberg law?

The definition of allele frequency is proportion of gene copies in a whole population that are of a specific allele type;the total number of gene copies is equal to two times the number of individuals in the population.

What is selection? How does it alter allele frequencies?

Brown insects living in a dark background survived in a ratio of 90/120,while the same insects in a lighter background survived in a ratio of 30/120.The ratio of relative fitness of the insects in dark backgrounds to lighter backgrounds is given as

List five forces that change the frequency of an allele in a population and discuss why the elimination of a deleterious recessive allele is nearly impossible.

One way scientists attempt to control confounding factors due to environmental variability is through cross-fostering.

Mendels Principles of Heredity

Extensions to Mendels Laws

The Chromosome Theory of Inheritance

Linkage, Recombination, and the Mapping of Genes on Chromosomes

Dna Structure, Replication, and Recombination

Anatomy and Function of a Gene: Dissection Through Mutation

Gene Expression: the Flow of Information From Dna to Rna to Protein

Digital Analysis of Genomes

Genome Annotation

Analyzing Genomic Variation

Chromosomal Rearrangements and Changes in Chromosome Number

Bacterial Genetics

Organellar Inheritance

Gene Regulation in Prokaryotes

Gene Regulation in Eukaryotes

Manipulating the Genomes of Eukaryotes

The Genetic Analysis of Development

The Genetics of Cancer

Variation and Selection in Populations

Genetics of Complex Traits

Exploring Synthetic Biology: Concepts, Techniques, and Applications

Filters

A cross between a tall and a short bean plant produced intermediate height in the F₁ generation.When the F₁ plants were crossed with plants of the original parental heights,plants with a range of heights in between the extremes were produced.The mode of inheritance is described as

The binomial Hardy-Weinberg equation is represented by p² + p²q² + q² = 1.