Question 1

You calculate an interference of 0.59.What does this number tell you?

Accepted Answer

A) You will not observe 59% of expected double crossovers. 
B) You will observe 59% double crossovers. 
C) You will observe 41% double crossovers. 
D) You will observe 59% of expected double crossovers. 
A) You will not observe 59% of expected double crossovers. 
B) You will observe 59% double crossovers. 
C) You will observe 41% double crossovers. 
D) You will observe 59% of expected double crossovers. A

Question 2

Which is NOT an acceptable notation for two linked genes,A and B,in a heterozygote?

Accepted Answer

A)    
B)    
C)    
D) AB/ab 
E) All of the above are acceptable notations. 
A)    
B)    
C)    
D) AB/ab 
E) All of the above are acceptable notations. C

Question 3

From the cross AB/ab *ab/ab,what is the recombination frequency if the progeny numbers are 72 AB/ab,68 ab/ab,17 Ab/ab,and 21 aB/ab?

Accepted Answer

A) 0.213 
B) 0.271 
C) 0.500 
D) 0.787 
E) cannot be determined 
A) 0.213 
B) 0.271 
C) 0.500 
D) 0.787 
E) cannot be determined A

Question 4

If genes A and B are linked,what is the maximum percentage of recombinant gametes that can be produced during gametogenesis?

Accepted Answer

A) 0% 
B) 25% 
C) 50% 
D) 75% 
E) 100% 
A) 0% 
B) 25% 
C) 50% 
D) 75% 
E) 100%

Question 5

In performing a dihybrid cross,you expect to see a 9:3:3:1 ratio.What is a good explanation if you do not see a 9:3:3:1 ratio in a dihybrid cross?

Accepted Answer

A) The two genes are not linked. 
B) The two genes are linked. 
C) One of the genes is dominant over the other. 
D) The two genes assort independently. 
E) This proves that Mendel's laws are incorrect. 
A) The two genes are not linked. 
B) The two genes are linked. 
C) One of the genes is dominant over the other. 
D) The two genes assort independently. 
E) This proves that Mendel's laws are incorrect.

Question 6

Consider the following three-point cross:  
Which of the following is not a possible genotype? Consider both recombined and nonrecombinant.)

Accepted Answer

A)   
B)   
C)   
D)   
E)   
A)   
B)   
C)   
D)   
E)

Question 7

What is the order of the linked genes R,S,and T if the distance between R and S is 22 m.u.,the distance between S and T is 8 m.u.,and the distance between R and T is 14 m.u.?

Accepted Answer

A) R S T 
B) S T R 
C) T R S 
D) cannot be determined 
A) R S T 
B) S T R 
C) T R S 
D) cannot be determined

Question 8

If a heterozygous parent AB/abis test-crossed to a homozygous recessive ab/ab),what will the progeny phenotypic ratio be if genes A and B are completely linked?

Accepted Answer

A) 1AB:1Ab:1aB:1ab 
B) 9AB:3Ab:3aB:1ab 
C) 1AB:1ab 
D) none of the above 
A) 1AB:1Ab:1aB:1ab 
B) 9AB:3Ab:3aB:1ab 
C) 1AB:1ab 
D) none of the above

You calculate an interference of 0.59.What does this number tell you?

Which is NOT an acceptable notation for two linked genes,A and B,in a heterozygote?

From the cross AB/ab *ab/ab,what is the recombination frequency if the progeny numbers are 72 AB/ab,68 ab/ab,17 Ab/ab,and 21 aB/ab?

If genes A and B are linked,what is the maximum percentage of recombinant gametes that can be produced during gametogenesis?

In performing a dihybrid cross,you expect to see a 9:3:3:1 ratio.What is a good explanation if you do not see a 9:3:3:1 ratio in a dihybrid cross?

Consider the following three-point cross: Which of the following is not a possible genotype? Consider both recombined and nonrecombinant.)

What is the order of the linked genes R,S,and T if the distance between R and S is 22 m.u.,the distance between S and T is 8 m.u.,and the distance between R and T is 14 m.u.?

If a heterozygous parent AB/abis test-crossed to a homozygous recessive ab/ab),what will the progeny phenotypic ratio be if genes A and B are completely linked?

Introduction to Genetics

Chromosomes and Cellular Reproduction

Basic Principles of Heredity

Extensions and Modifications of Basic Principles

Bacterial and Viral Genetic Systems

Chromosome Variation

DNA: The Chemical Nature of the Gene

DNA Replication

From DNA to Proteins: Transcription and Rna Processing

From DNA to Proteins: Translation

Control of Gene Expression

Gene Mutations, Transposable Elements, and Dna Repair

Molecular Genetic Analysis, Biotechnology, and Genomics

Cancer Genetics

Quantitative Genetics

Population and Evolutionary Genetics

Filters

Exam 5: Linkage, Recombination, and Eukaryotic Gene Mapping

You calculate an interference of 0.59.What does this number tell you?

Which is NOT an acceptable notation for two linked genes,A and B,in a heterozygote?

From the cross AB/ab *ab/ab,what is the recombination frequency if the progeny numbers are 72 AB/ab,68 ab/ab,17 Ab/ab,and 21 aB/ab?

If genes A and B are linked,what is the maximum percentage of recombinant gametes that can be produced during gametogenesis?

In performing a dihybrid cross,you expect to see a 9:3:3:1 ratio.What is a good explanation if you do not see a 9:3:3:1 ratio in a dihybrid cross?

Consider the following three-point cross: Which of the following is not a possible genotype? Consider both recombined and nonrecombinant.)

What is the order of the linked genes R,S,and T if the distance between R and S is 22 m.u.,the distance between S and T is 8 m.u.,and the distance between R and T is 14 m.u.?

If a heterozygous parent AB/abis test-crossed to a homozygous recessive ab/ab),what will the progeny phenotypic ratio be if genes A and B are completely linked?

Introduction to Genetics

Chromosomes and Cellular Reproduction

Basic Principles of Heredity

Extensions and Modifications of Basic Principles

Bacterial and Viral Genetic Systems

Chromosome Variation

DNA: The Chemical Nature of the Gene

DNA Replication

From DNA to Proteins: Transcription and Rna Processing

From DNA to Proteins: Translation

Control of Gene Expression

Gene Mutations, Transposable Elements, and Dna Repair

Molecular Genetic Analysis, Biotechnology, and Genomics

Cancer Genetics

Quantitative Genetics

Population and Evolutionary Genetics

Filters