Question 1

In QTL mapping,the parental strains are crossed and the F₁ generation backcrossed to which of the following?

Accepted Answer

A)  the F₂ generation 
B)  the parental generation 
C)  a strain that is homozygous recessive for all markers 
D)  a wild-type organism 
A)  the F₂ generation 
B)  the parental generation 
C)  a strain that is homozygous recessive for all markers 
D)  a wild-type organism

Question 2

Which of the following steps is NOT used in conducting a backcross in order to map a QTL?

Accepted Answer

A)  Two inbred strains that differ in a quantitative trait are crossed. 
B)  The F1 offspring are crossed with each other. 
C)  The F2 offspring contain different combinations of the parental chromosomes. 
D)  By using genetic markers, it is determined which parent each chromosome came from and thus isolate the genes. 
A)  Two inbred strains that differ in a quantitative trait are crossed. 
B)  The F1 offspring are crossed with each other. 
C)  The F2 offspring contain different combinations of the parental chromosomes. 
D)  By using genetic markers, it is determined which parent each chromosome came from and thus isolate the genes.

Question 3

In calculations of the degrees of freedom for a correlation coefficient,what value does the degrees of freedom take?

Accepted Answer

A)  (n - 1) 
B)  (n - 2) 
C)  (n - 1)/2 
D)  2(n - 1) 
A)  (n - 1) 
B)  (n - 2) 
C)  (n - 1)/2 
D)  2(n - 1)

Question 4

Heritability is the amount of genetic variation in a particular population and a particular environment.

Accepted Answer

A) True 
 B)False

Question 5

The amount of phenotypic variation in a group that is due to genetic variation is called heritability.

Accepted Answer

A) True 
 B)False

Question 6

When analyzing two variables,the strength of the association between the variables is called the ________.

Accepted Answer

A)  covariance 
B)  standard deviation 
C)  correlation coefficient 
D)  variance 
A)  covariance 
B)  standard deviation 
C)  correlation coefficient 
D)  variance

Question 7

A heritability value of 0.997 indicates which of the following?

Accepted Answer

A)  The majority of the phenotypic variation has a genetic basis. 
B)  The majority of the phenotypic variation has an environmental basis. 
C)  The trait is polygenic. 
D)  There is a significant difference between the two strains. 
E)  None of these choices are correct. 
A)  The majority of the phenotypic variation has a genetic basis. 
B)  The majority of the phenotypic variation has an environmental basis. 
C)  The trait is polygenic. 
D)  There is a significant difference between the two strains. 
E)  None of these choices are correct.

Question 8

If the difference between the mean of the parents and the mean of the starting population is 1.0 and the the difference between the mean of the offspring and the mean of the starting population is 0.45 then the realized heritability is

Accepted Answer

A)  1.45 
B)  2.22 
C)  0.45 
D)  0.55 
A)  1.45 
B)  2.22 
C)  0.45 
D)  0.55

Question 9

A trait that varies measurably in a species is called a discontinuous trait.

Accepted Answer

A) True 
 B)False

Question 10

A population that is homozygous for a given allele is called monomorphic.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following best describes the degrees of freedom for the calculation of variance?

Accepted Answer

A)  (n + 1) 
B)  2(n + 1) 
C)  (n - 1)/n 
D)  (n - 1) 
A)  (n + 1) 
B)  2(n + 1) 
C)  (n - 1)/n 
D)  (n - 1)

Question 12

Which of the following is incorrect concerning quantitative traits?

Accepted Answer

A)  Individuals fall into distinct classes for comparison. 
B)  The phenotypic variation for the trait is continuous. 
C)  The frequency distribution follows a bell-shaped curve. 
D)  All of these choices are correct. 
A)  Individuals fall into distinct classes for comparison. 
B)  The phenotypic variation for the trait is continuous. 
C)  The frequency distribution follows a bell-shaped curve. 
D)  All of these choices are correct.

Question 13

Realized heritability may be determined from artificial selection experiments.

Accepted Answer

A) True 
 B)False

In QTL mapping,the parental strains are crossed and the F₁ generation backcrossed to which of the following?

Which of the following steps is NOT used in conducting a backcross in order to map a QTL?

In calculations of the degrees of freedom for a correlation coefficient,what value does the degrees of freedom take?

Heritability is the amount of genetic variation in a particular population and a particular environment.

The amount of phenotypic variation in a group that is due to genetic variation is called heritability.

When analyzing two variables,the strength of the association between the variables is called the ________.

A heritability value of 0.997 indicates which of the following?

If the difference between the mean of the parents and the mean of the starting population is 1.0 and the the difference between the mean of the offspring and the mean of the starting population is 0.45 then the realized heritability is

A trait that varies measurably in a species is called a discontinuous trait.

A population that is homozygous for a given allele is called monomorphic.

Which of the following best describes the degrees of freedom for the calculation of variance?

Which of the following is incorrect concerning quantitative traits?

Realized heritability may be determined from artificial selection experiments.

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

Population Genetics

Filters

Exam 24: Quantitative Genetics

In QTL mapping,the parental strains are crossed and the F₁ generation backcrossed to which of the following?

Which of the following steps is NOT used in conducting a backcross in order to map a QTL?

In calculations of the degrees of freedom for a correlation coefficient,what value does the degrees of freedom take?

Heritability is the amount of genetic variation in a particular population and a particular environment.

The amount of phenotypic variation in a group that is due to genetic variation is called heritability.

When analyzing two variables,the strength of the association between the variables is called the ________.

A heritability value of 0.997 indicates which of the following?

If the difference between the mean of the parents and the mean of the starting population is 1.0 and the the difference between the mean of the offspring and the mean of the starting population is 0.45 then the realized heritability is

A trait that varies measurably in a species is called a discontinuous trait.

A population that is homozygous for a given allele is called monomorphic.

Which of the following best describes the degrees of freedom for the calculation of variance?

Which of the following is incorrect concerning quantitative traits?

Realized heritability may be determined from artificial selection experiments.

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

Population Genetics

Filters