The origin of F 2 plants obtained by R.E. Clausen and T.H. Goodspeed and the number of chromosomes observed during metaphase I and metaphase II. Introduction: There are two species of Nicotiana , namely- Nicotiana glutinosa ( 2n = 24 ) and Nicotiana tabacum ( 2n = 48 ) which can be intercrossed; however, the F 1 progeny are sterile. During the experiment conducted by R.E. Clausen and T.H. Goodspeed, they obtained one fertile F 1 plant. The F 2 progeny obtained after self-crossing were also fertile and on examination, it was found that the number of chromosomes in the metaphase I was 36 pairs of homologous chromosomes and number of chromosomes in metaphase II were 36 individual chromosomes.

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Answer 1

Question

Chapter 8.4, Problem 42AQP

Summary Introduction

To explain:

The origin of F₂ plants obtained by R.E. Clausen and T.H. Goodspeed and the number of chromosomes observed during metaphase I and metaphase II.

Introduction:

There are two species of Nicotiana, namely- Nicotiana glutinosa(2n=24) and Nicotiana tabacum(2n=48) which can be intercrossed; however, the F₁ progeny are sterile. During the experiment conducted by R.E. Clausen and T.H. Goodspeed, they obtained one fertile F₁ plant. The F₂ progeny obtained after self-crossing were also fertile and on examination, it was found that the number of chromosomes in the metaphase I was 36 pairs of homologous chromosomes and number of chromosomes in metaphase II were 36 individual chromosomes.

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Answer 2

Question

Chapter 8.4, Problem 42AQP

Summary Introduction

To explain:

The origin of F₂ plants obtained by R.E. Clausen and T.H. Goodspeed and the number of chromosomes observed during metaphase I and metaphase II.

Introduction:

There are two species of Nicotiana, namely- Nicotiana glutinosa(2n=24) and Nicotiana tabacum(2n=48) which can be intercrossed; however, the F₁ progeny are sterile. During the experiment conducted by R.E. Clausen and T.H. Goodspeed, they obtained one fertile F₁ plant. The F₂ progeny obtained after self-crossing were also fertile and on examination, it was found that the number of chromosomes in the metaphase I was 36 pairs of homologous chromosomes and number of chromosomes in metaphase II were 36 individual chromosomes.

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Answer 3

Question

Chapter 8.4, Problem 42AQP

Summary Introduction

To explain:

The origin of F₂ plants obtained by R.E. Clausen and T.H. Goodspeed and the number of chromosomes observed during metaphase I and metaphase II.

Introduction:

There are two species of Nicotiana, namely- Nicotiana glutinosa(2n=24) and Nicotiana tabacum(2n=48) which can be intercrossed; however, the F₁ progeny are sterile. During the experiment conducted by R.E. Clausen and T.H. Goodspeed, they obtained one fertile F₁ plant. The F₂ progeny obtained after self-crossing were also fertile and on examination, it was found that the number of chromosomes in the metaphase I was 36 pairs of homologous chromosomes and number of chromosomes in metaphase II were 36 individual chromosomes.

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Answer 4

Question

Chapter 8.4, Problem 42AQP

Summary Introduction

To explain:

The origin of F₂ plants obtained by R.E. Clausen and T.H. Goodspeed and the number of chromosomes observed during metaphase I and metaphase II.

Introduction:

There are two species of Nicotiana, namely- Nicotiana glutinosa(2n=24) and Nicotiana tabacum(2n=48) which can be intercrossed; however, the F₁ progeny are sterile. During the experiment conducted by R.E. Clausen and T.H. Goodspeed, they obtained one fertile F₁ plant. The F₂ progeny obtained after self-crossing were also fertile and on examination, it was found that the number of chromosomes in the metaphase I was 36 pairs of homologous chromosomes and number of chromosomes in metaphase II were 36 individual chromosomes.

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Answer 5

Chapter 8.4, Problem 42AQP

Summary Introduction

To explain:

The origin of F₂ plants obtained by R.E. Clausen and T.H. Goodspeed and the number of chromosomes observed during metaphase I and metaphase II.

Introduction:

There are two species of Nicotiana, namely- Nicotiana glutinosa(2n=24) and Nicotiana tabacum(2n=48) which can be intercrossed; however, the F₁ progeny are sterile. During the experiment conducted by R.E. Clausen and T.H. Goodspeed, they obtained one fertile F₁ plant. The F₂ progeny obtained after self-crossing were also fertile and on examination, it was found that the number of chromosomes in the metaphase I was 36 pairs of homologous chromosomes and number of chromosomes in metaphase II were 36 individual chromosomes.

Answer 6

Chapter 8.4, Problem 42AQP

Summary Introduction

To explain:

The origin of F₂ plants obtained by R.E. Clausen and T.H. Goodspeed and the number of chromosomes observed during metaphase I and metaphase II.

Introduction:

There are two species of Nicotiana, namely- Nicotiana glutinosa(2n=24) and Nicotiana tabacum(2n=48) which can be intercrossed; however, the F₁ progeny are sterile. During the experiment conducted by R.E. Clausen and T.H. Goodspeed, they obtained one fertile F₁ plant. The F₂ progeny obtained after self-crossing were also fertile and on examination, it was found that the number of chromosomes in the metaphase I was 36 pairs of homologous chromosomes and number of chromosomes in metaphase II were 36 individual chromosomes.

Answer 7

Chapter 8.4, Problem 42AQP

Summary Introduction

To explain:

The origin of F₂ plants obtained by R.E. Clausen and T.H. Goodspeed and the number of chromosomes observed during metaphase I and metaphase II.

Introduction:

There are two species of Nicotiana, namely- Nicotiana glutinosa(2n=24) and Nicotiana tabacum(2n=48) which can be intercrossed; however, the F₁ progeny are sterile. During the experiment conducted by R.E. Clausen and T.H. Goodspeed, they obtained one fertile F₁ plant. The F₂ progeny obtained after self-crossing were also fertile and on examination, it was found that the number of chromosomes in the metaphase I was 36 pairs of homologous chromosomes and number of chromosomes in metaphase II were 36 individual chromosomes.

Answer 8

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Answer 11

Ch. 8.1 - Prob. 1COQ Ch. 8.1 - Prob. 18AQP Ch. 8.1 - Prob. 19AQP Ch. 8.1 - Prob. 1TPSQ Ch. 8.2 - Prob. 1CC Ch. 8.2 - Prob. 2CC Ch. 8.2 - Prob. 3CC Ch. 8.2 - Prob. 4CC Ch. 8.2 - Prob. 2COQ Ch. 8.2 - Prob. 3COQ

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