Question 1

Traits that fall into discrete categories are called continuous traits.

Accepted Answer

A) True 
 B)False  False

Question 2

Since quantitative traits can be described by a plot of the frequency vs value of the trait since

Accepted Answer

A) the trait can have a range of values. 
B) the traits are discrete. 
C) the traits are discontinuous 
D) the traits are frequently the result of a single gene with more than two alleles. 
A) the trait can have a range of values. 
B) the traits are discrete. 
C) the traits are discontinuous 
D) the traits are frequently the result of a single gene with more than two alleles. A

Question 3

What is a typical characteristic of a quantitative trait?

Accepted Answer

A)  No environmental influence on the trait 
B)  Polygenic basis 
C)  Discontinuous distribution of phenotypic trait. 
D)  Usually the graph of trait versus frequency has two distinct peaks. 
A)  No environmental influence on the trait 
B)  Polygenic basis 
C)  Discontinuous distribution of phenotypic trait. 
D)  Usually the graph of trait versus frequency has two distinct peaks. B

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

The square root of the variance is called the _____.

Accepted Answer

A) Mean 
B) Standard deviation 
C) Standard error 
D) Covariance 
A) Mean 
B) Standard deviation 
C) Standard error 
D) Covariance

Question 6

After several generations of artificial selective breeding, a plateau is reached where artificial selection is no longer effective. This is called the _______.

Accepted Answer

A) realized limit 
B) realized heritability 
C) selection coefficient 
D) selection limit 
A) realized limit 
B) realized heritability 
C) selection coefficient 
D) selection limit

Question 7

What is trure concerning a quantitative trait?

Accepted Answer

A) Individuals fall into distinct classes for comparison 
B) The phenotypic variation for the trait is continuous 
C) The phenotypic variation for the trait falls into two to three classes 
D) The frequency distribution of the trait will have an asymmetrical shape 
A) Individuals fall into distinct classes for comparison 
B) The phenotypic variation for the trait is continuous 
C) The phenotypic variation for the trait falls into two to three classes 
D) The frequency distribution of the trait will have an asymmetrical shape

Question 8

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 9

Heritability may be calculated as which of the following?

Accepted Answer

A) The total variance minus environmental variance 
B) Total variance minus genetic variance 
C) Genetic variance divided by environmental variance 
D) Genetic variance divided by total variance 
A) The total variance minus environmental variance 
B) Total variance minus genetic variance 
C) Genetic variance divided by environmental variance 
D) Genetic variance divided by total variance

Question 10

Many organisms used in modern agriculture are a result of artificial selection.

Accepted Answer

A) True 
 B)False

Question 11

Eye color in Drosophila is an example of

Accepted Answer

A)  Discontinuous, non-quantitative trait 
B)  Discontinuous, quantitative trait 
C)  Continuous, non-quantitative trait 
D)  Continuous, quantitative trait 
A)  Discontinuous, non-quantitative trait 
B)  Discontinuous, quantitative trait 
C)  Continuous, non-quantitative trait 
D)  Continuous, quantitative trait

Question 12

What is the standard deviation for the mother's and daughter's heights?

Accepted Answer

A) Mothers: 6.07 Daughters: 4.6 
B) Mothers: 5.07 Daughters: 4.6 
C) Mothers: 6.07 Daughters: 5.6 
D) Mothers: 4.07 Daughters: 4.6 
A) Mothers: 6.07 Daughters: 4.6 
B) Mothers: 5.07 Daughters: 4.6 
C) Mothers: 6.07 Daughters: 5.6 
D) Mothers: 4.07 Daughters: 4.6

Question 13

What is the mean height for the mothers and daughters?

Accepted Answer

A) Mothers: 66.75 inches Daughters: 67.62 inches 
B) Mothers: 65.75 Daughters: 67.62 
C) Mothers: 66.75 Daughters: 66.52 
D) Mothers: 65.67 Daughters: 66.45 
A) Mothers: 66.75 inches Daughters: 67.62 inches 
B) Mothers: 65.75 Daughters: 67.62 
C) Mothers: 66.75 Daughters: 66.52 
D) Mothers: 65.67 Daughters: 66.45

Question 14

A regression analysis predicts how much one variable will change in response to a change in a second variable.

Accepted Answer

A) True 
 B)False

Question 15

The variance is sum of the standard deviation from the mean divided by the degrees of freedom.

Accepted Answer

A) True 
 B)False

Question 16

The equation that describes the relationship between phenotypic variance, genetic variance and environmental variance is

Accepted Answer

A) VP = VG + VE 
B) 1 = VG + VE  + VP 
C) VE = VG + VP 
D) VG = VP + VE 
A) VP = VG + VE 
B) 1 = VG + VE  + VP 
C) VE = VG + VP 
D) VG = VP + VE

Question 17

QTL stands for quantitative trait loci and is an example of monogenic inheritance.

Accepted Answer

A) True 
 B)False

Question 18

Polygenic inheritance may result in a continuum of phenotypes because

Accepted Answer

A)  the genes that are involved can be considered to be co-dominant. 
B)  the alleles for each gene are either completely dominant or recessive. 
C)  there is a low environmental effect. 
D)  there is a high environmental effect. 
A)  the genes that are involved can be considered to be co-dominant. 
B)  the alleles for each gene are either completely dominant or recessive. 
C)  there is a low environmental effect. 
D)  there is a high environmental effect.

Question 19

Calculate the narrow-sense heritability of height between aunts and neices if the observed phenotypic correlation coefficient is 0.1.

Accepted Answer

A) 0.4 
B) 2.5 
C) 4 
D) 0.25 
A) 0.4 
B) 2.5 
C) 4 
D) 0.25

Question 20

The sum of all of the values for a trait, divided by the total number of individuals, is called the standard deviation.

Accepted Answer

A) True 
 B)False

Exam 27: Quantitative Genetics

Traits that fall into discrete categories are called continuous traits.

Since quantitative traits can be described by a plot of the frequency vs value of the trait since

What is a typical characteristic of a quantitative trait?

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

The square root of the variance is called the _____.

After several generations of artificial selective breeding, a plateau is reached where artificial selection is no longer effective. This is called the _______.

What is trure concerning a quantitative trait?

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

Heritability may be calculated as which of the following?

Many organisms used in modern agriculture are a result of artificial selection.

Eye color in Drosophila is an example of

What is the standard deviation for the mother's and daughter's heights?

What is the mean height for the mothers and daughters?

A regression analysis predicts how much one variable will change in response to a change in a second variable.

The variance is sum of the standard deviation from the mean divided by the degrees of freedom.

The equation that describes the relationship between phenotypic variance, genetic variance and environmental variance is

QTL stands for quantitative trait loci and is an example of monogenic inheritance.

Polygenic inheritance may result in a continuum of phenotypes because

Calculate the narrow-sense heritability of height between aunts and neices if the observed phenotypic correlation coefficient is 0.1.

The sum of all of the values for a trait, divided by the total number of individuals, is called the standard deviation.

Overview of Genetics

Mendelian Inheritance

Chromosome Transmission During Cell Division and Sexual Reproduction

Extensions of Mendelian Inheritance

Non-Mendelian Inheritance

Genetic Linkage and Mapping in Eukaryotes

Genetic Transfer and Mapping in Bacteria and Bacteriophages

Variation in Chromosome Structure and Number

Molecular Structure of DNA and RNA

Chromosome Organization and Molecular Structure

DNA Replication

Gene Transcription and RNA Modification

Translation of MRNA

Gene Regulation in Bacteria

Gene Regulation in Eukaryotes I: Transcriptional Regulation

Gene Regulation in Eukaryotes II: Epigenetics and Regulation at the RNA Level

Genetics of Viruses

Gene Mutation and Dna Repair

Recombination and Transposition at the Molecular Level

DNA Technologies

Biotechnology

Genomics I: Analysis of DNA

Genomics II: Functional Genomics, Proteomics, and Bioinformatics

Medical Genetics and Cancer

Developmental Genetics

Population Genetics

Evolutionary Genetics

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