The organism responsible for most stomach ulcers. Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

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Answer 1

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Chapter 22, Problem 6SQ

Summary Introduction

To determine: The organism responsible for most stomach ulcers.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Summary Introduction

To determine: How ulcers can be treated if detected earlier.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

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Question #3: In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming there was just one gene conferring gametophytic obligate apomixis, and that the two parents are inbreds, what would be the consequences of such a cross if: a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the parental cross. b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the…

Question #5: Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The genes show independent assortment. Recessive alleles at both loci are required for the facultative apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C. At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype. A facultative apomict male, capable of producing viable pollen, was crossed with a sexually reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following temperatures*: a) 15°C? b) 25°C? *for full credit, show crosses and genotypes where appropriate. Remember to position the female first (left side) in the cross. Type your answer here:

Answer 2

Question

Chapter 22, Problem 6SQ

Summary Introduction

To determine: The organism responsible for most stomach ulcers.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Summary Introduction

To determine: How ulcers can be treated if detected earlier.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

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Answer 3

Question

Chapter 22, Problem 6SQ

Summary Introduction

To determine: The organism responsible for most stomach ulcers.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Summary Introduction

To determine: How ulcers can be treated if detected earlier.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Expert Solution & Answer

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Answer 4

Question

Chapter 22, Problem 6SQ

Summary Introduction

To determine: The organism responsible for most stomach ulcers.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Summary Introduction

To determine: How ulcers can be treated if detected earlier.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Expert Solution & Answer

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Answer 5

Chapter 22, Problem 6SQ

Summary Introduction

To determine: The organism responsible for most stomach ulcers.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Summary Introduction

To determine: How ulcers can be treated if detected earlier.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Answer 6

Chapter 22, Problem 6SQ

Summary Introduction

To determine: The organism responsible for most stomach ulcers.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Answer 7

Chapter 22, Problem 6SQ

Summary Introduction

To determine: The organism responsible for most stomach ulcers.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Answer 8

Summary Introduction

To determine: How ulcers can be treated if detected earlier.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Answer 9

Summary Introduction

To determine: How ulcers can be treated if detected earlier.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 22 - Prob. 1SQ Ch. 22 - Prob. 2SQ Ch. 22 - Prob. 3SQ Ch. 22 - Why dont astronauts in zero gravity have trouble...Ch. 22 - Which class of large biological molecules is...Ch. 22 - Prob. 6SQ Ch. 22 - Prob. 7SQ Ch. 22 - Explain haw treatment of a chronic infection with...Ch. 22 - Why is the amount of oxygen you consume...Ch. 22 - Prob. 10SQ

The organism responsible for most stomach ulcers. Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Solution Summary: The author explains that most stomach ulcers are caused by an acid-tolerant bacterium called Helicobacter pylori, which damages the coat of the mucous, making it accessible for the gastric juice.

Concept explainers

To determine: The organism responsible for most stomach ulcers.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

To determine: How ulcers can be treated if detected earlier.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

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Chapter 22 Solutions

The organism responsible for most stomach ulcers. Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

Solution Summary: The author explains that most stomach ulcers are caused by an acid-tolerant bacterium called Helicobacter pylori, which damages the coat of the mucous, making it accessible for the gastric juice.

Concept explainers

To determine: The organism responsible for most stomach ulcers. Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

To determine: How ulcers can be treated if detected earlier. Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

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Chapter 22 Solutions

To determine: The organism responsible for most stomach ulcers.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.

To determine: How ulcers can be treated if detected earlier.

Concept introduction: Gastric ulcer is a condition in which the lining of the esophagus erodes by gastric juice faster than it can regenerate. Gastric juice can cause pain in the esophagus when it backflow.