Question 1

Recessive alleles are usually loss-of-function mutations.

Accepted Answer

A) True 
 B)False

Question 2

In humans,brown eye color (B)is dominant to blue eyes (b).A brown-eyed man marries a woman with brown eyes and they have three blue-eyed daughters.What are the genotypes of the man and the woman?

Accepted Answer

A) BB and Bb 
B) BB and BB 
C) Bb and bb 
D) Bb and Bb 
E) bb and bb 
A) BB and Bb 
B) BB and BB 
C) Bb and bb 
D) Bb and Bb 
E) bb and bb

Question 3

Which of the following statements concerning the inheritance of a dominant trait is true?

Accepted Answer

A) Every affected person must have at least one affected parent. 
B) The trait is observed to skip generations. 
C) An affected heterozygote will transmit the allele to all of his or her offspring. 
D) Nonaffected parents can have affected offspring. 
E) The trait is passed along paternal lines. 
A) Every affected person must have at least one affected parent. 
B) The trait is observed to skip generations. 
C) An affected heterozygote will transmit the allele to all of his or her offspring. 
D) Nonaffected parents can have affected offspring. 
E) The trait is passed along paternal lines.

Question 4

State the key difference between Mendel's principle of segregation and independent assortment.

Accepted Answer

Segregation refers to separati

Question 5

Speculate on the molecular basis for dominance and recessiveness,using flower color as an example,where red is dominant over white.

Accepted Answer

If the trait is controlled by a gene res

Question 6

In the F2 generation,how many genotypic classes could be generated from a dihybrid cross of two heterozygotes in which the genes involved show complete dominance?

Accepted Answer

A) 3 
B) 4 
C) 8 
D) 9 
E) 12 
A) 3 
B) 4 
C) 8 
D) 9 
E) 12

Question 7

Match between columns
                        Premises: Dominant allele
Phenotype
Test cross
Recessive allele
Monohybrid cross
Genotype
Dihybrid cross

Accepted Answer

The Answer of Allele that has to be homozygous to is...

Question 8

Match between columns
                        Premises: Euploid
Aneuploid
Diploid
Polyploid
Haploid

Accepted Answer

The Answer of One half of a complete set of is...

Question 9

A monohybrid (one-gene)cross yields 4 genotypic classes,and a dihybrid (two-gene)cross yields 16.How many classes are expected from a tetrahybrid (four-gene)cross?

Accepted Answer

Following the simple

Question 10

A man whose father expresses a recessive trait marries a woman whose brother expresses the same recessive trait.What is the likelihood that the newlyweds could have a child expressing the trait?

Accepted Answer

A)  $\frac { 1 } { 2 }$ 
B)  $\frac { 1 } { 3 }$ 
C)  $\frac { 1 } { 4 }$ 
D)  $\frac { 1 } { 5 }$ 
E)  $\frac { 1 } { 6 }$ 
A)  $\frac { 1 } { 2 }$ 
B)  $\frac { 1 } { 3 }$ 
C)  $\frac { 1 } { 4 }$ 
D)  $\frac { 1 } { 5 }$ 
E)  $\frac { 1 } { 6 }$

Question 11

In lilies,white flowers (W)are dominant to purple flowers (w).If two plants that are heterozygous for flower color are mated,the genotypic ratio of the offspring would be

Accepted Answer

A) 3:1. 
B) 1:1. 
C) 1:2:1. 
D) 9:3:3:1. 
E) 1:1:1:1. 
A) 3:1. 
B) 1:1. 
C) 1:2:1. 
D) 9:3:3:1. 
E) 1:1:1:1.

Question 12

Which of the following genotypes would not usually be represented in a gamete?

Accepted Answer

A) AA 
B) AB 
C) Ab 
D) aB 
E) ab 
A) AA 
B) AB 
C) Ab 
D) aB 
E) ab

Question 13

The chi-squared statistic can best be described as

Accepted Answer

A) the standardized deviation of observed data from expected data. 
B) a statistically significant test. 
C) a statistical test used in genetics. 
D) a statistical test that compares observed and expected population means. 
E) None of these 
A) the standardized deviation of observed data from expected data. 
B) a statistically significant test. 
C) a statistical test used in genetics. 
D) a statistical test that compares observed and expected population means. 
E) None of these

Question 14

In his monohybrid crosses for seed color in peas,Mendel reported 6,022 yellow seeds and 2,001 green seeds.How many of each color class were expected?

Accepted Answer

A) 4,011 green and 4,011 yellow 
B) All should be green 
C) All should be yellow 
D) 6,017 yellow and 2,006 green 
E) 2,006 yellow and 6,017 green 
A) 4,011 green and 4,011 yellow 
B) All should be green 
C) All should be yellow 
D) 6,017 yellow and 2,006 green 
E) 2,006 yellow and 6,017 green

Question 15

Net or overall probabilities are obtained by multiplying separate independent probabilities.This is formally known as

Accepted Answer

A) the sum rule. 
B) the chi-square test. 
C) the product rule. 
D) the sign test. 
E) the probability rule. 
A) the sum rule. 
B) the chi-square test. 
C) the product rule. 
D) the sign test. 
E) the probability rule.

Question 16

A testcross with a heterozygous dominant individual will yield only heterozygous dominant offspring.

Accepted Answer

A) True 
 B)False

Question 17

In snapdragons,the genes A,B,C,D,and E assort independently of one another.If an Aa Bb Cc dd EE plant is crossed with an Aa bb cc Dd Ee plant,what is the probability of obtaining an offspring that is phenotypically dominant for all five traits?

Accepted Answer

The probability of obtaining a

Question 18

Mendel's insights started with his approach of analyzing discrete traits,leading to the idea of "particulate" rather than "blending" inheritance.Yet this was an uncommon way to view the inheritance of traits because many found it counterintuitive or contrary to experience.How so?

Accepted Answer

Experience with breeding pets or livesto

Question 19

A P value in statistics is

Accepted Answer

A) a measure of the accuracy of a data set. 
B) the probability of getting the observed data distribution by chance. 
C) arbitrarily set depending on a statistical test. 
D) a measure of the accuracy of a statistical test. 
E) None of these 
A) a measure of the accuracy of a data set. 
B) the probability of getting the observed data distribution by chance. 
C) arbitrarily set depending on a statistical test. 
D) a measure of the accuracy of a statistical test. 
E) None of these

Question 20

A man and a woman with normal phenotypes have several children,one of whom has albinism.
a.What can you conclude about the genotype of the mother?
b.What is the probability that the children who do not display albinism are heterozygous?

Accepted Answer

(a)Both parents must be heterozygous (a

Exam 11: Mendelian Genetics

Recessive alleles are usually loss-of-function mutations.

In humans,brown eye color (B)is dominant to blue eyes (b).A brown-eyed man marries a woman with brown eyes and they have three blue-eyed daughters.What are the genotypes of the man and the woman?

Which of the following statements concerning the inheritance of a dominant trait is true?

State the key difference between Mendel's principle of segregation and independent assortment.

Speculate on the molecular basis for dominance and recessiveness,using flower color as an example,where red is dominant over white.

In the F2 generation,how many genotypic classes could be generated from a dihybrid cross of two heterozygotes in which the genes involved show complete dominance?

A monohybrid (one-gene)cross yields 4 genotypic classes,and a dihybrid (two-gene)cross yields 16.How many classes are expected from a tetrahybrid (four-gene)cross?

A man whose father expresses a recessive trait marries a woman whose brother expresses the same recessive trait.What is the likelihood that the newlyweds could have a child expressing the trait?

In lilies,white flowers (W)are dominant to purple flowers (w).If two plants that are heterozygous for flower color are mated,the genotypic ratio of the offspring would be

Which of the following genotypes would not usually be represented in a gamete?

The chi-squared statistic can best be described as

In his monohybrid crosses for seed color in peas,Mendel reported 6,022 yellow seeds and 2,001 green seeds.How many of each color class were expected?

Net or overall probabilities are obtained by multiplying separate independent probabilities.This is formally known as

A testcross with a heterozygous dominant individual will yield only heterozygous dominant offspring.

In snapdragons,the genes A,B,C,D,and E assort independently of one another.If an Aa Bb Cc dd EE plant is crossed with an Aa bb cc Dd Ee plant,what is the probability of obtaining an offspring that is phenotypically dominant for all five traits?

Mendel's insights started with his approach of analyzing discrete traits,leading to the idea of "particulate" rather than "blending" inheritance.Yet this was an uncommon way to view the inheritance of traits because many found it counterintuitive or contrary to experience.How so?

A P value in statistics is

A man and a woman with normal phenotypes have several children,one of whom has albinism. a.What can you conclude about the genotype of the mother? b.What is the probability that the children who do not display albinism are heterozygous?

Genetics: An Introduction

DNA: The Genetic Material

DNA Replication

Gene Function

Gene Expression: Transcription

Gene Expression: Translation

Dna Mutation, DNA Repair, and Transposable Elements

Genomics: The Mapping and Sequencing of Genomes

Functional and Comparative Genomics

Recombinant DNA Technology

Chromosomal Basis of Inheritance

Extensions of and Deviations From Mendelian Genetic Principles

Genetic Mapping in Eukaryotes

Genetics of Bacteria and Bacteriophages

Variations in Chromosome Structure and Number

Regulation of Gene Expression in Bacteria and Bacteriophages

Regulation of Gene Expression in Eukaryotes

Genetic Analysis of Development

Genetics of Cancer

Population Genetics

Quantitative Genetics

Molecular Evolution

Filters

In the F₂ generation,how many genotypic classes could be generated from a dihybrid cross of two heterozygotes in which the genes involved show complete dominance?