Whether the genes linked or not. Introduction: Recombination frequency is a measure of genetic linkage and is used in the creation of a genetic linkage map. Recombination frequency (θ) is the frequency with which a single chromosomal crossover will take place between two genes during meiosis.

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Answer 1

Question

Chapter 4, Problem 43P

a.

Summary Introduction

To determine: Whether the genes linked or not.

Introduction: Recombination frequency is a measure of genetic linkage and is used in the creation of a genetic linkage map. Recombination frequency (θ) is the frequency with which a single chromosomal crossover will take place between two genes during meiosis.

b.

Summary Introduction

To determine: A map (if linked) or two maps (if not linked), showing map distances based on straightforward recombinant frequency.

Introduction: A centimorgan (cM) is a unit that describes a recombination frequency of 1%. In this way, we can measure the genetic distance between two loci, based upon their recombination frequency.

c.

Summary Introduction

To determine: A correct the map distances for multiple crossovers.

Introduction: The crossover operator is analogous to reproduction and biological crossover. In this, more than one parent is selected, and one or more off-springs are produced using the genetic material of the parents.

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Please label the tetrad type in the table as PD (parental ditype), NPD (non parental ditype) or T (tetratype) and answer the following questions a) Are the genes linked? Please explain SPECIFICALLY how you can distinguish between linked and unlinked genes in this instance. b) If the two genes are linked, calculate the % recombination between ser and thr. Show the formula used, as well as all of your calculations. c) Draw a single map illustrating the arrangement of the two genes on the chromosome with respect to each other and to the centromere of the chromosome. Make sure to map ALL three distances

A yeast geneticist irradiates haploid cells of a strain thatis an adenine-requiring auxotrophic mutant, caused bymutation of the gene ade1. Millions of the irradiatedcells are plated on minimal medium, and a small number of cells divide and produce prototrophic colonies.These colonies are crossed individually with a wildtype strain. Two types of results are obtained:(1) prototroph × wild type : progeny all prototrophic(2) prototroph × wild type : progeny 75% prototrophic,25% adenine-requiring auxotrophsa. Explain the difference between these two types ofresults.b. Write the genotypes of the prototrophs in each case.c. What progeny phenotypes and ratios do you predictfrom crossing a prototroph of type 2 by the original ade1auxotroph?

Consider two maize plants:a. Genotype C/c m ; Ac/Ac+, where cm is an unstable allele caused by a Ds insertionb. Genotype C/c m, where cm is an unstable allele caused by Ac insertionWhat phenotypes would be produced and in what proportions when (1) each plant is crossed with a basepair-substitution mutant c/c and (2) the plant in part a is crossed with the plant in part b? Assume that Ac and c are unlinked, that the chromosome-breakage frequency is negligible, and that mutant c /C is Ac+.

Answer 2

Question

Chapter 4, Problem 43P

a.

Summary Introduction

To determine: Whether the genes linked or not.

Introduction: Recombination frequency is a measure of genetic linkage and is used in the creation of a genetic linkage map. Recombination frequency (θ) is the frequency with which a single chromosomal crossover will take place between two genes during meiosis.

b.

Summary Introduction

To determine: A map (if linked) or two maps (if not linked), showing map distances based on straightforward recombinant frequency.

Introduction: A centimorgan (cM) is a unit that describes a recombination frequency of 1%. In this way, we can measure the genetic distance between two loci, based upon their recombination frequency.

c.

Summary Introduction

To determine: A correct the map distances for multiple crossovers.

Introduction: The crossover operator is analogous to reproduction and biological crossover. In this, more than one parent is selected, and one or more off-springs are produced using the genetic material of the parents.

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Answer 3

Question

Chapter 4, Problem 43P

a.

Summary Introduction

To determine: Whether the genes linked or not.

Introduction: Recombination frequency is a measure of genetic linkage and is used in the creation of a genetic linkage map. Recombination frequency (θ) is the frequency with which a single chromosomal crossover will take place between two genes during meiosis.

b.

Summary Introduction

To determine: A map (if linked) or two maps (if not linked), showing map distances based on straightforward recombinant frequency.

Introduction: A centimorgan (cM) is a unit that describes a recombination frequency of 1%. In this way, we can measure the genetic distance between two loci, based upon their recombination frequency.

c.

Summary Introduction

To determine: A correct the map distances for multiple crossovers.

Introduction: The crossover operator is analogous to reproduction and biological crossover. In this, more than one parent is selected, and one or more off-springs are produced using the genetic material of the parents.

Expert Solution & Answer

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Answer 4

Question

Chapter 4, Problem 43P

a.

Summary Introduction

To determine: Whether the genes linked or not.

Introduction: Recombination frequency is a measure of genetic linkage and is used in the creation of a genetic linkage map. Recombination frequency (θ) is the frequency with which a single chromosomal crossover will take place between two genes during meiosis.

b.

Summary Introduction

To determine: A map (if linked) or two maps (if not linked), showing map distances based on straightforward recombinant frequency.

Introduction: A centimorgan (cM) is a unit that describes a recombination frequency of 1%. In this way, we can measure the genetic distance between two loci, based upon their recombination frequency.

c.

Summary Introduction

To determine: A correct the map distances for multiple crossovers.

Introduction: The crossover operator is analogous to reproduction and biological crossover. In this, more than one parent is selected, and one or more off-springs are produced using the genetic material of the parents.

Expert Solution & Answer

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Answer 5

Chapter 4, Problem 43P

a.

Summary Introduction

To determine: Whether the genes linked or not.

Introduction: Recombination frequency is a measure of genetic linkage and is used in the creation of a genetic linkage map. Recombination frequency (θ) is the frequency with which a single chromosomal crossover will take place between two genes during meiosis.

b.

Summary Introduction

To determine: A map (if linked) or two maps (if not linked), showing map distances based on straightforward recombinant frequency.

Introduction: A centimorgan (cM) is a unit that describes a recombination frequency of 1%. In this way, we can measure the genetic distance between two loci, based upon their recombination frequency.

c.

Summary Introduction

To determine: A correct the map distances for multiple crossovers.

Introduction: The crossover operator is analogous to reproduction and biological crossover. In this, more than one parent is selected, and one or more off-springs are produced using the genetic material of the parents.

Answer 6

Chapter 4, Problem 43P

a.

Summary Introduction

To determine: Whether the genes linked or not.

Introduction: Recombination frequency is a measure of genetic linkage and is used in the creation of a genetic linkage map. Recombination frequency (θ) is the frequency with which a single chromosomal crossover will take place between two genes during meiosis.

Answer 7

Chapter 4, Problem 43P

a.

Summary Introduction

To determine: Whether the genes linked or not.

Introduction: Recombination frequency is a measure of genetic linkage and is used in the creation of a genetic linkage map. Recombination frequency (θ) is the frequency with which a single chromosomal crossover will take place between two genes during meiosis.

Answer 8

b.

Summary Introduction

To determine: A map (if linked) or two maps (if not linked), showing map distances based on straightforward recombinant frequency.

Introduction: A centimorgan (cM) is a unit that describes a recombination frequency of 1%. In this way, we can measure the genetic distance between two loci, based upon their recombination frequency.

Answer 9

b.

Summary Introduction

To determine: A map (if linked) or two maps (if not linked), showing map distances based on straightforward recombinant frequency.

Introduction: A centimorgan (cM) is a unit that describes a recombination frequency of 1%. In this way, we can measure the genetic distance between two loci, based upon their recombination frequency.

Answer 10

c.

Summary Introduction

To determine: A correct the map distances for multiple crossovers.

Introduction: The crossover operator is analogous to reproduction and biological crossover. In this, more than one parent is selected, and one or more off-springs are produced using the genetic material of the parents.

Answer 11

c.

Summary Introduction

To determine: A correct the map distances for multiple crossovers.

Introduction: The crossover operator is analogous to reproduction and biological crossover. In this, more than one parent is selected, and one or more off-springs are produced using the genetic material of the parents.

Answer 12

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Answer 13

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Answer 14

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Answer 15

Ch. 4 - Prob. 1P Ch. 4 - Prob. 5P Ch. 4 - Prob. 12P Ch. 4 - Prob. 13P Ch. 4 - Prob. 14P Ch. 4 - Prob. 15P Ch. 4 - Prob. 16P Ch. 4 - Prob. 17P Ch. 4 - Prob. 18P Ch. 4 - Prob. 19P

Whether the genes linked or not. Introduction: Recombination frequency is a measure of genetic linkage and is used in the creation of a genetic linkage map. Recombination frequency (θ) is the frequency with which a single chromosomal crossover will take place between two genes during meiosis.

Solution Summary: The author explains that recombination frequency is used in the creation of a genetic linkage map.

Concept explainers

Videos

To determine: A correct the map distances for multiple crossovers.

Introduction: The crossover operator is analogous to reproduction and biological crossover. In this, more than one parent is selected, and one or more off-springs are produced using the genetic material of the parents.

Want to see the full answer?

Chapter 4 Solutions

Whether the genes linked or not. Introduction: Recombination frequency is a measure of genetic linkage and is used in the creation of a genetic linkage map. Recombination frequency (θ) is the frequency with which a single chromosomal crossover will take place between two genes during meiosis.

Solution Summary: The author explains that recombination frequency is used in the creation of a genetic linkage map.

Concept explainers

Videos

To determine: A correct the map distances for multiple crossovers. Introduction: The crossover operator is analogous to reproduction and biological crossover. In this, more than one parent is selected, and one or more off-springs are produced using the genetic material of the parents.

Want to see the full answer?

Chapter 4 Solutions

To determine: A correct the map distances for multiple crossovers.

Introduction: The crossover operator is analogous to reproduction and biological crossover. In this, more than one parent is selected, and one or more off-springs are produced using the genetic material of the parents.