a. To determine: The relationship between the two loci and mating type locus.. Introduction: A locus may be defined as the position of a gene on a chromosome. The loci help in gene mapping of an organism.

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Answer 1

Question

Chapter 5, Problem 41P

Summary Introduction

a.

To determine:

The relationship between the two loci and mating type locus..

Introduction:

A locus may be defined as the position of a gene on a chromosome. The loci help in gene mapping of an organism.

Summary Introduction

b.

To determine:

The reason that the given data cannot be used to calculate the centromere to gene distance.

Introduction:

Gene distance may be defined as the distance between the two genes present on the same chromosome. The linked genes are present on the same chromosome and may inherit together during the process of meiosis.

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Two crosses were made in Neurospora involvingthe mating type locus and either the ad or p genes.In both cases, the mating type locus (A or a) was oneof the loci whose segregation was scored. One crosswas ad A × ad+ a (cross i), and the other was p A × p+ a(cross ii). From cross i, 10 parental ditype, 9 nonparental ditype, and 1 tetratype asci were seen.From cross ii, the results were 24 parental ditype,3 nonparental ditype, and 27 tetratype asci.a. What are the linkage relationships between themating type locus and the other two loci?b. Although these two crosses were performed inNeurospora, you cannot use the data given tocalculate centromere-to-gene distances for anyof these genes. Why not?

In a diploid plant species, an F1 with the genotype Mm Rr Ss is test crossed to a pure breeding recessive plant with the genotype mm rr ss. The offspring genotypes are as follows: Genotype Number Mm Rr Ss 687 Mm Rr ss 5 Mm rr Ss 68 Mm rr ss 196 mm Rr Ss 185 mm Rr ss 72 mm rr Ss 8 mm rr ss 679 Total 1900 1. What is the interference value for this data set?

In a diploid plant species, an F1 with the genotype Mm Rr Ss is test crossed to a pure breeding recessive plant with the genotype mm rr ss. The offspring genotypes are as follows: Genotype Number Mm Rr Ss 687 Mm Rr ss 5 Mm rr Ss 68 Mm rr ss 196 mm Rr Ss 185 mm Rr ss 72 mm rr Ss 8 mm rr ss 679 Total 1900 1. Why is the recombination frequency for the outside pair of genes not equal to the sum of the recombination between the adjacent gene pairs?

Answer 2

Question

Chapter 5, Problem 41P

Summary Introduction

a.

To determine:

The relationship between the two loci and mating type locus..

Introduction:

A locus may be defined as the position of a gene on a chromosome. The loci help in gene mapping of an organism.

Summary Introduction

b.

To determine:

The reason that the given data cannot be used to calculate the centromere to gene distance.

Introduction:

Gene distance may be defined as the distance between the two genes present on the same chromosome. The linked genes are present on the same chromosome and may inherit together during the process of meiosis.

Expert Solution & Answer

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Answer 3

Question

Chapter 5, Problem 41P

Summary Introduction

a.

To determine:

The relationship between the two loci and mating type locus..

Introduction:

A locus may be defined as the position of a gene on a chromosome. The loci help in gene mapping of an organism.

Summary Introduction

b.

To determine:

The reason that the given data cannot be used to calculate the centromere to gene distance.

Introduction:

Gene distance may be defined as the distance between the two genes present on the same chromosome. The linked genes are present on the same chromosome and may inherit together during the process of meiosis.

Expert Solution & Answer

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Answer 4

Question

Chapter 5, Problem 41P

Summary Introduction

a.

To determine:

The relationship between the two loci and mating type locus..

Introduction:

A locus may be defined as the position of a gene on a chromosome. The loci help in gene mapping of an organism.

Summary Introduction

b.

To determine:

The reason that the given data cannot be used to calculate the centromere to gene distance.

Introduction:

Gene distance may be defined as the distance between the two genes present on the same chromosome. The linked genes are present on the same chromosome and may inherit together during the process of meiosis.

Expert Solution & Answer

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Answer 5

Chapter 5, Problem 41P

Summary Introduction

a.

To determine:

The relationship between the two loci and mating type locus..

Introduction:

A locus may be defined as the position of a gene on a chromosome. The loci help in gene mapping of an organism.

Summary Introduction

b.

To determine:

The reason that the given data cannot be used to calculate the centromere to gene distance.

Introduction:

Gene distance may be defined as the distance between the two genes present on the same chromosome. The linked genes are present on the same chromosome and may inherit together during the process of meiosis.

Answer 6

Chapter 5, Problem 41P

Summary Introduction

a.

To determine:

The relationship between the two loci and mating type locus..

Introduction:

A locus may be defined as the position of a gene on a chromosome. The loci help in gene mapping of an organism.

Answer 7

Chapter 5, Problem 41P

Summary Introduction

a.

To determine:

The relationship between the two loci and mating type locus..

Introduction:

A locus may be defined as the position of a gene on a chromosome. The loci help in gene mapping of an organism.

Answer 8

Summary Introduction

b.

To determine:

The reason that the given data cannot be used to calculate the centromere to gene distance.

Introduction:

Gene distance may be defined as the distance between the two genes present on the same chromosome. The linked genes are present on the same chromosome and may inherit together during the process of meiosis.

Answer 9

Summary Introduction

b.

To determine:

The reason that the given data cannot be used to calculate the centromere to gene distance.

Introduction:

Gene distance may be defined as the distance between the two genes present on the same chromosome. The linked genes are present on the same chromosome and may inherit together during the process of meiosis.

Answer 10

Expert Solution & Answer

Answer 11

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Answer 12

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Answer 13

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a. To determine: The relationship between the two loci and mating type locus.. Introduction: A locus may be defined as the position of a gene on a chromosome. The loci help in gene mapping of an organism.

Solution Summary: The author explains the relationship between the two loci and mating type locus. The Neurospora cross can be used to calculate gene distance only but not the gene centromere distance.

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a.

To determine:

The relationship between the two loci and mating type locus..

Introduction:

A locus may be defined as the position of a gene on a chromosome. The loci help in gene mapping of an organism.

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Chapter 5 Solutions