The probability of an affected child, if mother’s brother is affected. Introduction : Duchenne muscular dystrophy is a critical type of muscular dystrophy. The sign of muscle defect begins typically around the age of four in boys and worsens quickly. Usually, muscle loss happens earliest in the thighs and pelvis, accompanied by the arms.

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Answer 1

Question

Chapter 2, Problem 61P

a.

Summary Introduction

To determine: The probability of an affected child, if mother’s brother is affected.

Introduction : Duchenne muscular dystrophy is a critical type of muscular dystrophy. The sign of muscle defect begins typically around the age of four in boys and worsens quickly. Usually, muscle loss happens earliest in the thighs and pelvis, accompanied by the arms.

b.

Summary Introduction

To determine: The probability that offspring have received the allele, if an individual’s mother's brother had Duchenne's disease.

Introduction: A gene defect causes the disease or mutation induces the gene helping the body to compose a protein termed dystrophin.

c.

Summary Introduction

To determine: The probability that an individual’s have received the allele, if the father’s brother had the disease.

Introduction: DMD happens due to the mutated DMD gene fails to compose some functional dystrophin mostly. Individuals with BMD genetic mutations produce dystrophin that is partly functional and preserves their muscles from deteriorating as severely or as promptly as in DMD.

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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 2, Problem 61P

a.

Summary Introduction

To determine: The probability of an affected child, if mother’s brother is affected.

Introduction : Duchenne muscular dystrophy is a critical type of muscular dystrophy. The sign of muscle defect begins typically around the age of four in boys and worsens quickly. Usually, muscle loss happens earliest in the thighs and pelvis, accompanied by the arms.

b.

Summary Introduction

To determine: The probability that offspring have received the allele, if an individual’s mother's brother had Duchenne's disease.

Introduction: A gene defect causes the disease or mutation induces the gene helping the body to compose a protein termed dystrophin.

c.

Summary Introduction

To determine: The probability that an individual’s have received the allele, if the father’s brother had the disease.

Introduction: DMD happens due to the mutated DMD gene fails to compose some functional dystrophin mostly. Individuals with BMD genetic mutations produce dystrophin that is partly functional and preserves their muscles from deteriorating as severely or as promptly as in DMD.

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Answer 3

Question

Chapter 2, Problem 61P

a.

Summary Introduction

To determine: The probability of an affected child, if mother’s brother is affected.

Introduction : Duchenne muscular dystrophy is a critical type of muscular dystrophy. The sign of muscle defect begins typically around the age of four in boys and worsens quickly. Usually, muscle loss happens earliest in the thighs and pelvis, accompanied by the arms.

b.

Summary Introduction

To determine: The probability that offspring have received the allele, if an individual’s mother's brother had Duchenne's disease.

Introduction: A gene defect causes the disease or mutation induces the gene helping the body to compose a protein termed dystrophin.

c.

Summary Introduction

To determine: The probability that an individual’s have received the allele, if the father’s brother had the disease.

Introduction: DMD happens due to the mutated DMD gene fails to compose some functional dystrophin mostly. Individuals with BMD genetic mutations produce dystrophin that is partly functional and preserves their muscles from deteriorating as severely or as promptly as in DMD.

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Answer 4

Question

Chapter 2, Problem 61P

a.

Summary Introduction

To determine: The probability of an affected child, if mother’s brother is affected.

Introduction : Duchenne muscular dystrophy is a critical type of muscular dystrophy. The sign of muscle defect begins typically around the age of four in boys and worsens quickly. Usually, muscle loss happens earliest in the thighs and pelvis, accompanied by the arms.

b.

Summary Introduction

To determine: The probability that offspring have received the allele, if an individual’s mother's brother had Duchenne's disease.

Introduction: A gene defect causes the disease or mutation induces the gene helping the body to compose a protein termed dystrophin.

c.

Summary Introduction

To determine: The probability that an individual’s have received the allele, if the father’s brother had the disease.

Introduction: DMD happens due to the mutated DMD gene fails to compose some functional dystrophin mostly. Individuals with BMD genetic mutations produce dystrophin that is partly functional and preserves their muscles from deteriorating as severely or as promptly as in DMD.

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Answer 5

Chapter 2, Problem 61P

a.

Summary Introduction

To determine: The probability of an affected child, if mother’s brother is affected.

Introduction : Duchenne muscular dystrophy is a critical type of muscular dystrophy. The sign of muscle defect begins typically around the age of four in boys and worsens quickly. Usually, muscle loss happens earliest in the thighs and pelvis, accompanied by the arms.

b.

Summary Introduction

To determine: The probability that offspring have received the allele, if an individual’s mother's brother had Duchenne's disease.

Introduction: A gene defect causes the disease or mutation induces the gene helping the body to compose a protein termed dystrophin.

c.

Summary Introduction

To determine: The probability that an individual’s have received the allele, if the father’s brother had the disease.

Introduction: DMD happens due to the mutated DMD gene fails to compose some functional dystrophin mostly. Individuals with BMD genetic mutations produce dystrophin that is partly functional and preserves their muscles from deteriorating as severely or as promptly as in DMD.

Answer 6

Chapter 2, Problem 61P

a.

Summary Introduction

To determine: The probability of an affected child, if mother’s brother is affected.

Introduction : Duchenne muscular dystrophy is a critical type of muscular dystrophy. The sign of muscle defect begins typically around the age of four in boys and worsens quickly. Usually, muscle loss happens earliest in the thighs and pelvis, accompanied by the arms.

Answer 7

Chapter 2, Problem 61P

a.

Summary Introduction

To determine: The probability of an affected child, if mother’s brother is affected.

Introduction : Duchenne muscular dystrophy is a critical type of muscular dystrophy. The sign of muscle defect begins typically around the age of four in boys and worsens quickly. Usually, muscle loss happens earliest in the thighs and pelvis, accompanied by the arms.

Answer 8

b.

Summary Introduction

To determine: The probability that offspring have received the allele, if an individual’s mother's brother had Duchenne's disease.

Introduction: A gene defect causes the disease or mutation induces the gene helping the body to compose a protein termed dystrophin.

Answer 9

b.

Summary Introduction

To determine: The probability that offspring have received the allele, if an individual’s mother's brother had Duchenne's disease.

Introduction: A gene defect causes the disease or mutation induces the gene helping the body to compose a protein termed dystrophin.

Answer 10

c.

Summary Introduction

To determine: The probability that an individual’s have received the allele, if the father’s brother had the disease.

Introduction: DMD happens due to the mutated DMD gene fails to compose some functional dystrophin mostly. Individuals with BMD genetic mutations produce dystrophin that is partly functional and preserves their muscles from deteriorating as severely or as promptly as in DMD.

Answer 11

c.

Summary Introduction

To determine: The probability that an individual’s have received the allele, if the father’s brother had the disease.

Introduction: DMD happens due to the mutated DMD gene fails to compose some functional dystrophin mostly. Individuals with BMD genetic mutations produce dystrophin that is partly functional and preserves their muscles from deteriorating as severely or as promptly as in DMD.

Answer 12

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Answer 13

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Answer 14

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Answer 15

Ch. 2 - Prob. 1P Ch. 2 - Prob. 2P Ch. 2 - Prob. 3P Ch. 2 - Prob. 4P Ch. 2 - Prob. 6P Ch. 2 - Prob. 7P Ch. 2 - Prob. 8P Ch. 2 - Prob. 9P Ch. 2 - Prob. 10P Ch. 2 - Prob. 11P

Solution Summary: The author explains that Duchenne muscular dystrophy is acquired in an X-linked pattern because of the gene that can conduct a DMD-causing mutation on the Y chromosome.

Concept explainers

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To determine: The probability that offspring have received the allele, if an individual’s mother's brother had Duchenne's disease.

Introduction: A gene defect causes the disease or mutation induces the gene helping the body to compose a protein termed dystrophin.

Want to see the full answer?

Chapter 2 Solutions

Solution Summary: The author explains that Duchenne muscular dystrophy is acquired in an X-linked pattern because of the gene that can conduct a DMD-causing mutation on the Y chromosome.

Concept explainers

Videos

To determine: The probability that offspring have received the allele, if an individual’s mother's brother had Duchenne's disease. Introduction: A gene defect causes the disease or mutation induces the gene helping the body to compose a protein termed dystrophin.

Want to see the full answer?

Chapter 2 Solutions

To determine: The probability that offspring have received the allele, if an individual’s mother's brother had Duchenne's disease.

Introduction: A gene defect causes the disease or mutation induces the gene helping the body to compose a protein termed dystrophin.