Question 1

If two individuals of a population,who vary in their phenotype,preferentially mate,it is called ________.

Accepted Answer

A)  Outbreeding 
B)  Inbreeding 
C)  Negative assortative mating 
D)  Positive assortative mating 
A)  Outbreeding 
B)  Inbreeding 
C)  Negative assortative mating 
D)  Positive assortative mating C

Question 2

A population with an allele for a gene that constitutes 99% of the alleles in the population means that the population is called monomorphic for that gene.

Accepted Answer

A) True 
 B)False  True

Question 3

Which term describes all the alleles of every gene in the population?

Accepted Answer

A)  conglomerate 
B)  gene pool 
C)  polymorphisms 
D)  genotype frequency 
A)  conglomerate 
B)  gene pool 
C)  polymorphisms 
D)  genotype frequency B

Question 4

The prevalence of the allele for sickle cell anemia in some populations is an example of which of the following?

Accepted Answer

A)  heterogeneous environments 
B)  balancing selection 
C)  inverted selection 
D)  non-Darwinian selection 
E)  nonrandom mating 
A)  heterogeneous environments 
B)  balancing selection 
C)  inverted selection 
D)  non-Darwinian selection 
E)  nonrandom mating

Question 5

The term for a group of individuals from the same species that can interbreed with one another is

Accepted Answer

A)  species. 
B)  population. 
C)  race. 
D)  community. 
E)  kingdom. 
A)  species. 
B)  population. 
C)  race. 
D)  community. 
E)  kingdom.

Question 6

Mutations represent

Accepted Answer

A)  a minor part of microevolution. 
B)  an essential part of microevolution. 
C)  deleterious changes to the fitness of an individual. 
D)  advantageous changes to genes. 
A)  a minor part of microevolution. 
B)  an essential part of microevolution. 
C)  deleterious changes to the fitness of an individual. 
D)  advantageous changes to genes.

Question 7

Most natural populations are in Hardy-Weinberg equilibrium.

Accepted Answer

A) True 
 B)False

Question 8

Repetitive sequences are useful for DNA fingerprinting because they

Accepted Answer

A)  are not inherited and so are unique to every individual. 
B)  are unique to every individual and change from generation to generation. 
C)  are inherited and can show significant variability between individuals. 
D)  never undergo mutation. 
A)  are not inherited and so are unique to every individual. 
B)  are unique to every individual and change from generation to generation. 
C)  are inherited and can show significant variability between individuals. 
D)  never undergo mutation.

Question 9

Which of the following is NOT an assumption of the Hardy-Weinberg equation?

Accepted Answer

A)  The population is large. 
B)  There is no migration into or out of the population. 
C)  There is no selection against a given genotype. 
D)  There is no mutation in the gene being studied. 
E)  There is nonrandom mating. 
A)  The population is large. 
B)  There is no migration into or out of the population. 
C)  There is no selection against a given genotype. 
D)  There is no mutation in the gene being studied. 
E)  There is nonrandom mating.

Question 10

The term for the mating for two genetically unrelated individuals is

Accepted Answer

A)  outbreeding. 
B)  inbreeding. 
C)  disassortative mating. 
D)  assertive mating. 
A)  outbreeding. 
B)  inbreeding. 
C)  disassortative mating. 
D)  assertive mating.

Question 11

Genetic drift has the greatest influence on allele frequencies for which population size?

Accepted Answer

A)  small 
B)  large 
C)  Genetic drift has the same impact on both large and small populations. 
D)  Genetic drift has no effect on the allele frequencies. 
A)  small 
B)  large 
C)  Genetic drift has the same impact on both large and small populations. 
D)  Genetic drift has no effect on the allele frequencies.

Question 12

A SNP would best be described as

Accepted Answer

A)  a gene that comes in multiple different alleles. 
B)  a balanced polymorphism system. 
C)  a single nucleotide difference between two DNA sequences. 
D)  the least frequent type of mutation. 
E)  None of these choices are correct. 
A)  a gene that comes in multiple different alleles. 
B)  a balanced polymorphism system. 
C)  a single nucleotide difference between two DNA sequences. 
D)  the least frequent type of mutation. 
E)  None of these choices are correct.

Question 13

Which of the following types of selection favors one extreme of a phenotypic distribution?

Accepted Answer

A)  disruptive selection 
B)  stabilizing selection 
C)  directional selection 
D)  balancing selection 
A)  disruptive selection 
B)  stabilizing selection 
C)  directional selection 
D)  balancing selection

Question 14

In the equation p² + 2pq + q² = 1,what does the term 2pq represent?

Accepted Answer

A)  the genotypic frequency of homozygous recessive individuals 
B)  the genotypic frequency of homozygous dominant individuals 
C)  the genotypic frequency of heterozygous individuals 
D)  the sum of the phenotypic frequencies in the population 
E)  None of these choices are correct. 
A)  the genotypic frequency of homozygous recessive individuals 
B)  the genotypic frequency of homozygous dominant individuals 
C)  the genotypic frequency of heterozygous individuals 
D)  the sum of the phenotypic frequencies in the population 
E)  None of these choices are correct.

Question 15

Consider a hypothetical gene B for which there are two alleles in the population.For every ten BB individuals that survive,six Bb individuals survive,and one bb individual survives.What are the relative fitness values for each genotype?

Accepted Answer

A)  wBB = 1.0; wBb = 0.6; wbb = 0.1 
B)  wBB = 100; wBb = 0.6; wbb = 0.01 
C)  wBB = 0.59; wBb = 0.35; wbb = 1.0 
D)  wB = 26; wb = 7 
A)  wBB = 1.0; wBb = 0.6; wbb = 0.1 
B)  wBB = 100; wBb = 0.6; wbb = 0.01 
C)  wBB = 0.59; wBb = 0.35; wbb = 1.0 
D)  wB = 26; wb = 7

Question 16

Which of the following types of selection is typically associated with quantitative traits?

Accepted Answer

A)  disruptive selection only 
B)  both stabilizing and disruptive selection 
C)  stabilizing selection only 
D)  balancing selection 
A)  disruptive selection only 
B)  both stabilizing and disruptive selection 
C)  stabilizing selection only 
D)  balancing selection

Question 17

The probability that a gene will be altered by a mutation is called the mutation rate.

Accepted Answer

A) True 
 B)False

Question 18

Calculate the inbreeding coefficient of an individual given an n of 4 (excluding the inbred offspring)with one common ancestor. The inbreeding of the common ancestor is unknown.

Accepted Answer

A)  25% 
B)  3.125% 
C)  6.25% 
D)  50% 
A)  25% 
B)  3.125% 
C)  6.25% 
D)  50%

Question 19

Given the allele frequency for a gene in population A is 0.3 and the frequency for the same allele in population B is 0.5 and that 25 individuals from A migrate to and mate randomly with the 475 individuals in population B,what is the new allele frequency (PC)in the conglomerate?

Accepted Answer

A)  0.052 
B)  0.2 
C)  0.8 
D)  0.49 
A)  0.052 
B)  0.2 
C)  0.8 
D)  0.49

Question 20

The formula p² + 2pq + q² = 1 is associated with which of the following?

Accepted Answer

A)  calculations of heterozygosity 
B)  Hardy-Weinberg equilibrium 
C)  calculations of recombination frequencies 
D)  degrees of freedom 
E)  None of these choices are correct. 
A)  calculations of heterozygosity 
B)  Hardy-Weinberg equilibrium 
C)  calculations of recombination frequencies 
D)  degrees of freedom 
E)  None of these choices are correct.

Exam 23: Population Genetics

If two individuals of a population,who vary in their phenotype,preferentially mate,it is called ________.

A population with an allele for a gene that constitutes 99% of the alleles in the population means that the population is called monomorphic for that gene.

Which term describes all the alleles of every gene in the population?

The prevalence of the allele for sickle cell anemia in some populations is an example of which of the following?

The term for a group of individuals from the same species that can interbreed with one another is

Mutations represent

Most natural populations are in Hardy-Weinberg equilibrium.

Repetitive sequences are useful for DNA fingerprinting because they

Which of the following is NOT an assumption of the Hardy-Weinberg equation?

The term for the mating for two genetically unrelated individuals is

Genetic drift has the greatest influence on allele frequencies for which population size?

A SNP would best be described as

Which of the following types of selection favors one extreme of a phenotypic distribution?

In the equation p² + 2pq + q² = 1,what does the term 2pq represent?

Consider a hypothetical gene B for which there are two alleles in the population.For every ten BB individuals that survive,six Bb individuals survive,and one bb individual survives.What are the relative fitness values for each genotype?

Which of the following types of selection is typically associated with quantitative traits?

The probability that a gene will be altered by a mutation is called the mutation rate.

Calculate the inbreeding coefficient of an individual given an n of 4 (excluding the inbred offspring)with one common ancestor. The inbreeding of the common ancestor is unknown.

Given the allele frequency for a gene in population A is 0.3 and the frequency for the same allele in population B is 0.5 and that 25 individuals from A migrate to and mate randomly with the 475 individuals in population B,what is the new allele frequency (PC)in the conglomerate?

The formula p² + 2pq + q² = 1 is associated with which of the following?

Overview of Genetics

Reproduction and Chromosome Transmission

Mendelian Inheritance

Sex Determination and Sex Chromosomes

Extensions of Mendelian Inheritance

Extranuclear Inheritance, Imprinting, and Maternal Effect

Genetic Linkage and Mapping in Eukaryotes

Variation in Chromosome Structure and Number

Genetics in Bacteria

Genetics of Viruses

Molecular Structure of DNA and RNA

Molecular Structure of Chromosomes and Transposition

Dna Replication and Recombination

Gene Transcription and RNA Modification

Translation of MRNA

Gene Regulation in Bacteria

Gene Regulation in Eukaryotes

Non-Coding Rnas

Gene Mutation and DNA Repair

Molecular Technologies

Genomics

Medical Genetics and Cancer

Quantitative Genetics

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