The most likely mode in the inheritance of each of these phenotypes . Introduction. The different forms of an allele in two organisms of the species can result in changes in their appearance even though their genetic composition is highly similar. These are gene polymorphisms that account for the change in the appearance of genetically similar organisms.

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Answer 1

Question

Chapter 3, Problem 61P

a.

Summary Introduction

To determine: The most likely mode in the inheritance of each of these phenotypes.

Introduction. The different forms of an allele in two organisms of the species can result in changes in their appearance even though their genetic composition is highly similar. These are gene polymorphisms that account for the change in the appearance of genetically similar organisms.

b.

Summary Introduction

To determine: The genotypes of all members in generation III.

Introduction. The law of segregation proposes that the alternative forms of the genes that are known as alleles separate during the formation of gametes. These gametes get one of the alleles that constitute the gene. Thus, during the formation of the zygote, these independent gametes come to fuse to provide the allele pair to the offspring.

c.

Summary Introduction

To determine: The probability of the first child to be dwarf and have a cataract and the probability of normal child.

Introduction. The dominant allele masks the expression of the recessive allele. The dominant allele is expressed in homozygous and heterozygous genotype while the recessive phenotype is only expressed under homozygous conditions.

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A genetic counsellor is working with a couple who have just had a child who has a debilitating autosomal recessive form of a disease termed epidemolysis bullosa (which causes severe external and internal skin fragility resulting in blistering etc). Neither parent has epidemolysis bullosa, nor does anyone in their families. What should the counsellor say to this couple? OA. "Because no one in either of your families has epidemolysis bullosa, you are not likely to have another baby with epidemolysis bullosa. You can safely have another child." OB. "Because you have had one child with epidemolysis bullosa, you must each carry the allele. Any child you have has a 50% chance of having the disease." OC. "Because you have had one child with epidemolysis bullosa, you must each carry the allele. Any child you have has a 25% chance of having the disease." OD. "Because you have had one child with epidemolysis bullosa, you must both carry the allele. However, since the chance of having an affected…

As a genetic counselor, you are asked to assess the risk for a couple with a family history of familial adenomatous polyposis (FAP) who are thinking about having children. Neither the husband nor the wife has colorectal cancer, but the husband has a sister with FAP. What is the probability that this couple will have a child with FAP? Are there any tests that you could recommend to help in this assessment?

Answer 2

Question

Chapter 3, Problem 61P

a.

Summary Introduction

To determine: The most likely mode in the inheritance of each of these phenotypes.

Introduction. The different forms of an allele in two organisms of the species can result in changes in their appearance even though their genetic composition is highly similar. These are gene polymorphisms that account for the change in the appearance of genetically similar organisms.

b.

Summary Introduction

To determine: The genotypes of all members in generation III.

Introduction. The law of segregation proposes that the alternative forms of the genes that are known as alleles separate during the formation of gametes. These gametes get one of the alleles that constitute the gene. Thus, during the formation of the zygote, these independent gametes come to fuse to provide the allele pair to the offspring.

c.

Summary Introduction

To determine: The probability of the first child to be dwarf and have a cataract and the probability of normal child.

Introduction. The dominant allele masks the expression of the recessive allele. The dominant allele is expressed in homozygous and heterozygous genotype while the recessive phenotype is only expressed under homozygous conditions.

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Answer 3

Question

Chapter 3, Problem 61P

a.

Summary Introduction

To determine: The most likely mode in the inheritance of each of these phenotypes.

Introduction. The different forms of an allele in two organisms of the species can result in changes in their appearance even though their genetic composition is highly similar. These are gene polymorphisms that account for the change in the appearance of genetically similar organisms.

b.

Summary Introduction

To determine: The genotypes of all members in generation III.

Introduction. The law of segregation proposes that the alternative forms of the genes that are known as alleles separate during the formation of gametes. These gametes get one of the alleles that constitute the gene. Thus, during the formation of the zygote, these independent gametes come to fuse to provide the allele pair to the offspring.

c.

Summary Introduction

To determine: The probability of the first child to be dwarf and have a cataract and the probability of normal child.

Introduction. The dominant allele masks the expression of the recessive allele. The dominant allele is expressed in homozygous and heterozygous genotype while the recessive phenotype is only expressed under homozygous conditions.

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Answer 4

Question

Chapter 3, Problem 61P

a.

Summary Introduction

To determine: The most likely mode in the inheritance of each of these phenotypes.

Introduction. The different forms of an allele in two organisms of the species can result in changes in their appearance even though their genetic composition is highly similar. These are gene polymorphisms that account for the change in the appearance of genetically similar organisms.

b.

Summary Introduction

To determine: The genotypes of all members in generation III.

Introduction. The law of segregation proposes that the alternative forms of the genes that are known as alleles separate during the formation of gametes. These gametes get one of the alleles that constitute the gene. Thus, during the formation of the zygote, these independent gametes come to fuse to provide the allele pair to the offspring.

c.

Summary Introduction

To determine: The probability of the first child to be dwarf and have a cataract and the probability of normal child.

Introduction. The dominant allele masks the expression of the recessive allele. The dominant allele is expressed in homozygous and heterozygous genotype while the recessive phenotype is only expressed under homozygous conditions.

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Answer 5

Chapter 3, Problem 61P

a.

Summary Introduction

To determine: The most likely mode in the inheritance of each of these phenotypes.

Introduction. The different forms of an allele in two organisms of the species can result in changes in their appearance even though their genetic composition is highly similar. These are gene polymorphisms that account for the change in the appearance of genetically similar organisms.

b.

Summary Introduction

To determine: The genotypes of all members in generation III.

Introduction. The law of segregation proposes that the alternative forms of the genes that are known as alleles separate during the formation of gametes. These gametes get one of the alleles that constitute the gene. Thus, during the formation of the zygote, these independent gametes come to fuse to provide the allele pair to the offspring.

c.

Summary Introduction

To determine: The probability of the first child to be dwarf and have a cataract and the probability of normal child.

Introduction. The dominant allele masks the expression of the recessive allele. The dominant allele is expressed in homozygous and heterozygous genotype while the recessive phenotype is only expressed under homozygous conditions.

Answer 6

Chapter 3, Problem 61P

a.

Summary Introduction

To determine: The most likely mode in the inheritance of each of these phenotypes.

Introduction. The different forms of an allele in two organisms of the species can result in changes in their appearance even though their genetic composition is highly similar. These are gene polymorphisms that account for the change in the appearance of genetically similar organisms.

Answer 7

Chapter 3, Problem 61P

a.

Summary Introduction

To determine: The most likely mode in the inheritance of each of these phenotypes.

Introduction. The different forms of an allele in two organisms of the species can result in changes in their appearance even though their genetic composition is highly similar. These are gene polymorphisms that account for the change in the appearance of genetically similar organisms.

Answer 8

b.

Summary Introduction

To determine: The genotypes of all members in generation III.

Introduction. The law of segregation proposes that the alternative forms of the genes that are known as alleles separate during the formation of gametes. These gametes get one of the alleles that constitute the gene. Thus, during the formation of the zygote, these independent gametes come to fuse to provide the allele pair to the offspring.

Answer 9

b.

Summary Introduction

To determine: The genotypes of all members in generation III.

Introduction. The law of segregation proposes that the alternative forms of the genes that are known as alleles separate during the formation of gametes. These gametes get one of the alleles that constitute the gene. Thus, during the formation of the zygote, these independent gametes come to fuse to provide the allele pair to the offspring.

Answer 10

c.

Summary Introduction

To determine: The probability of the first child to be dwarf and have a cataract and the probability of normal child.

Introduction. The dominant allele masks the expression of the recessive allele. The dominant allele is expressed in homozygous and heterozygous genotype while the recessive phenotype is only expressed under homozygous conditions.

Answer 11

c.

Summary Introduction

To determine: The probability of the first child to be dwarf and have a cataract and the probability of normal child.

Introduction. The dominant allele masks the expression of the recessive allele. The dominant allele is expressed in homozygous and heterozygous genotype while the recessive phenotype is only expressed under homozygous conditions.

Answer 12

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Answer 13

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Answer 14

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Answer 15

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

Solution Summary: The author explains that the different forms of an allele in two organisms of the species can result in changes in their appearance even though their genetic composition is highly similar.

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