The conclusion for such a research results would lead to. Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

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Answer 1

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Chapter 3, Problem 70P

a.

Summary Introduction

To determine: The conclusion for such a research results would lead to.

Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

b.

Summary Introduction

To determine: The genotype and the phenotype of the F1.

Introduction: Male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

c.

Summary Introduction

To determine: The results of the testcross and genotypes and phenotypes.

Introduction: In corn breeding, the cytoplasm that was used initially to provide the male sterility was the Texas or T cytoplasm.

d.

Summary Introduction

To determine: The result of a cross in which the male parent is

(i) heterozygous at both restorer loci.

(ii) homozygous dominant at one restorer locus and homozygous recessive at the other.

(iii) heterozygous at one restorer locus and homozygous recessive at the other.

(iv) heterozygous at one restorer locus and homozygous dominant at the other.

Introduction: Hybrid production requires a plant from which no viable male gametes are introduced, and this selective exclusion of viable male gametes can be accomplished via different paths.

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In rice, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male part of rice plants (i.e. the stamen) unable to produce fertile pollen; the female parts, however, remain receptive to pollination by pollen from male fertile rice plants. However, the presence of a nuclear fertility restorer gene F restores fertility to male-sterile lines. Give the result(s) of the cross and explain the phenotype of the offspring.

One form of male sterility in corn is maternally transmitted. Plants of a male-sterile line crossed with normalpollen give male-sterile plants. In addition, some lines ofcorn are known to carry a dominant nuclear restorer allele (Rf ) that restores pollen fertility in male-sterile lines.a. Research shows that the introduction of restoreralleles into male-sterile lines does not alter or affectthe maintenance of the cytoplasmic factors for malesterility. What kind of research results would lead tosuch a conclusion?b. A male-sterile plant is crossed with pollen from aplant homozygous for Rf. What is the genotype of theF1? The phenotype?c. The F1 plants from part b are used as females in atestcross with pollen from a normal plant (rf/rf ). Whatare the results of this testcross? Give genotypes andphenotypes, and designate the kind of cytoplasm.d. The restorer allele already described can be calledRf-1. Another dominant restorer, Rf-2, has been found.Rf-1 and Rf-2 are located on different…

In corn, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male part of corn plants (i.e. the tassel) unable to produce fertile pollen; the female parts, however, remain receptive to pollination by pollen from male-fertile corn plants. However, the presence of a nuclear fertility restorer gene F restores fertility to male-sterile lines. Using the following color-coded circles, simulate the crosses indicated below. Put the illustrations of crosses in the spaces provided. Be sure to include in the labels the genotypes and phenotypes of the offspring in each cross. Big light green circle - male-sterile cytoplasm Big orange circle - male-fertile cytoplasm Small orange circle - FF nucleus Small half-light green-half-orange circle - Ff nucleus Small light-green circle - ff nucleus

Answer 2

Question

Chapter 3, Problem 70P

a.

Summary Introduction

To determine: The conclusion for such a research results would lead to.

Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

b.

Summary Introduction

To determine: The genotype and the phenotype of the F1.

Introduction: Male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

c.

Summary Introduction

To determine: The results of the testcross and genotypes and phenotypes.

Introduction: In corn breeding, the cytoplasm that was used initially to provide the male sterility was the Texas or T cytoplasm.

d.

Summary Introduction

To determine: The result of a cross in which the male parent is

(i) heterozygous at both restorer loci.

(ii) homozygous dominant at one restorer locus and homozygous recessive at the other.

(iii) heterozygous at one restorer locus and homozygous recessive at the other.

(iv) heterozygous at one restorer locus and homozygous dominant at the other.

Introduction: Hybrid production requires a plant from which no viable male gametes are introduced, and this selective exclusion of viable male gametes can be accomplished via different paths.

Expert Solution & Answer

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Answer 3

Question

Chapter 3, Problem 70P

a.

Summary Introduction

To determine: The conclusion for such a research results would lead to.

Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

b.

Summary Introduction

To determine: The genotype and the phenotype of the F1.

Introduction: Male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

c.

Summary Introduction

To determine: The results of the testcross and genotypes and phenotypes.

Introduction: In corn breeding, the cytoplasm that was used initially to provide the male sterility was the Texas or T cytoplasm.

d.

Summary Introduction

To determine: The result of a cross in which the male parent is

(i) heterozygous at both restorer loci.

(ii) homozygous dominant at one restorer locus and homozygous recessive at the other.

(iii) heterozygous at one restorer locus and homozygous recessive at the other.

(iv) heterozygous at one restorer locus and homozygous dominant at the other.

Introduction: Hybrid production requires a plant from which no viable male gametes are introduced, and this selective exclusion of viable male gametes can be accomplished via different paths.

Expert Solution & Answer

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Answer 4

Question

Chapter 3, Problem 70P

a.

Summary Introduction

To determine: The conclusion for such a research results would lead to.

Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

b.

Summary Introduction

To determine: The genotype and the phenotype of the F1.

Introduction: Male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

c.

Summary Introduction

To determine: The results of the testcross and genotypes and phenotypes.

Introduction: In corn breeding, the cytoplasm that was used initially to provide the male sterility was the Texas or T cytoplasm.

d.

Summary Introduction

To determine: The result of a cross in which the male parent is

(i) heterozygous at both restorer loci.

(ii) homozygous dominant at one restorer locus and homozygous recessive at the other.

(iii) heterozygous at one restorer locus and homozygous recessive at the other.

(iv) heterozygous at one restorer locus and homozygous dominant at the other.

Introduction: Hybrid production requires a plant from which no viable male gametes are introduced, and this selective exclusion of viable male gametes can be accomplished via different paths.

Expert Solution & Answer

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Answer 5

Chapter 3, Problem 70P

a.

Summary Introduction

To determine: The conclusion for such a research results would lead to.

Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

b.

Summary Introduction

To determine: The genotype and the phenotype of the F1.

Introduction: Male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

c.

Summary Introduction

To determine: The results of the testcross and genotypes and phenotypes.

Introduction: In corn breeding, the cytoplasm that was used initially to provide the male sterility was the Texas or T cytoplasm.

d.

Summary Introduction

To determine: The result of a cross in which the male parent is

(i) heterozygous at both restorer loci.

(ii) homozygous dominant at one restorer locus and homozygous recessive at the other.

(iii) heterozygous at one restorer locus and homozygous recessive at the other.

(iv) heterozygous at one restorer locus and homozygous dominant at the other.

Introduction: Hybrid production requires a plant from which no viable male gametes are introduced, and this selective exclusion of viable male gametes can be accomplished via different paths.

Answer 6

Chapter 3, Problem 70P

a.

Summary Introduction

To determine: The conclusion for such a research results would lead to.

Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

Answer 7

Chapter 3, Problem 70P

a.

Summary Introduction

To determine: The conclusion for such a research results would lead to.

Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

Answer 8

b.

Summary Introduction

To determine: The genotype and the phenotype of the F1.

Introduction: Male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

Answer 9

b.

Summary Introduction

To determine: The genotype and the phenotype of the F1.

Introduction: Male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

Answer 10

c.

Summary Introduction

To determine: The results of the testcross and genotypes and phenotypes.

Introduction: In corn breeding, the cytoplasm that was used initially to provide the male sterility was the Texas or T cytoplasm.

Answer 11

c.

Summary Introduction

To determine: The results of the testcross and genotypes and phenotypes.

Introduction: In corn breeding, the cytoplasm that was used initially to provide the male sterility was the Texas or T cytoplasm.

Answer 12

d.

Summary Introduction

To determine: The result of a cross in which the male parent is

(i) heterozygous at both restorer loci.

(ii) homozygous dominant at one restorer locus and homozygous recessive at the other.

(iii) heterozygous at one restorer locus and homozygous recessive at the other.

(iv) heterozygous at one restorer locus and homozygous dominant at the other.

Introduction: Hybrid production requires a plant from which no viable male gametes are introduced, and this selective exclusion of viable male gametes can be accomplished via different paths.

Answer 13

d.

Summary Introduction

To determine: The result of a cross in which the male parent is

(i) heterozygous at both restorer loci.

(ii) homozygous dominant at one restorer locus and homozygous recessive at the other.

(iii) heterozygous at one restorer locus and homozygous recessive at the other.

(iv) heterozygous at one restorer locus and homozygous dominant at the other.

Introduction: Hybrid production requires a plant from which no viable male gametes are introduced, and this selective exclusion of viable male gametes can be accomplished via different paths.

Answer 14

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Answer 15

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Answer 16

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Answer 17

Ch. 3 - Prob. 1P Ch. 3 - Prob. 2P Ch. 3 - Prob. 3P Ch. 3 - Prob. 4P Ch. 3 - Prob. 5P Ch. 3 - Prob. 6P Ch. 3 - Prob. 7P Ch. 3 - Prob. 8P Ch. 3 - Prob. 9P Ch. 3 - Prob. 10P

The conclusion for such a research results would lead to. Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

Solution Summary: The author explains that cytoplasmic male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

Concept explainers

Videos

To determine: The conclusion for such a research results would lead to.

Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

To determine: The genotype and the phenotype of the F1.

Introduction: Male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

To determine: The results of the testcross and genotypes and phenotypes.

Introduction: In corn breeding, the cytoplasm that was used initially to provide the male sterility was the Texas or T cytoplasm.

Want to see the full answer?

Chapter 3 Solutions

The conclusion for such a research results would lead to. Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

Solution Summary: The author explains that cytoplasmic male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

Concept explainers

Videos

To determine: The conclusion for such a research results would lead to. Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

To determine: The genotype and the phenotype of the F1. Introduction: Male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

To determine: The results of the testcross and genotypes and phenotypes. Introduction: In corn breeding, the cytoplasm that was used initially to provide the male sterility was the Texas or T cytoplasm.

Want to see the full answer?

Chapter 3 Solutions

To determine: The conclusion for such a research results would lead to.

Introduction: Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.

To determine: The genotype and the phenotype of the F1.

Introduction: Male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.

To determine: The results of the testcross and genotypes and phenotypes.

Introduction: In corn breeding, the cytoplasm that was used initially to provide the male sterility was the Texas or T cytoplasm.