The results produced in the given first cross. Introduction: According to Mendelian inheritance , a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous condition.

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Answer 1

Question

Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 14, Problem 8GP

Summary Introduction

To explain: The results produced in the given first cross.

Introduction: According to Mendelian inheritance, a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous condition.

Summary Introduction

To explain: The unusual ratio that has occurred in the second generation.

Introduction: In some organisms, presence of certain genes leads to the death of the organism. Those genes are known as “Lethals” or lethal genes. They can be dominant or recessive. However, recessive alleles are common, whereas the dominant alleles are rare. This is because it is impossible to mask the harmful allele in a heterozygous condition. Lethal alleles cause death before the organism can reproduce. Tay-Sach’s disease is an example of lethal disorder in humans.

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Answer 2

Question

Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 14, Problem 8GP

Summary Introduction

To explain: The results produced in the given first cross.

Introduction: According to Mendelian inheritance, a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous condition.

Summary Introduction

To explain: The unusual ratio that has occurred in the second generation.

Introduction: In some organisms, presence of certain genes leads to the death of the organism. Those genes are known as “Lethals” or lethal genes. They can be dominant or recessive. However, recessive alleles are common, whereas the dominant alleles are rare. This is because it is impossible to mask the harmful allele in a heterozygous condition. Lethal alleles cause death before the organism can reproduce. Tay-Sach’s disease is an example of lethal disorder in humans.

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Answer 3

Question

Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 14, Problem 8GP

Summary Introduction

To explain: The results produced in the given first cross.

Introduction: According to Mendelian inheritance, a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous condition.

Summary Introduction

To explain: The unusual ratio that has occurred in the second generation.

Introduction: In some organisms, presence of certain genes leads to the death of the organism. Those genes are known as “Lethals” or lethal genes. They can be dominant or recessive. However, recessive alleles are common, whereas the dominant alleles are rare. This is because it is impossible to mask the harmful allele in a heterozygous condition. Lethal alleles cause death before the organism can reproduce. Tay-Sach’s disease is an example of lethal disorder in humans.

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Check out a sample textbook solution

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Answer 4

Question

Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 14, Problem 8GP

Summary Introduction

To explain: The results produced in the given first cross.

Introduction: According to Mendelian inheritance, a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous condition.

Summary Introduction

To explain: The unusual ratio that has occurred in the second generation.

Introduction: In some organisms, presence of certain genes leads to the death of the organism. Those genes are known as “Lethals” or lethal genes. They can be dominant or recessive. However, recessive alleles are common, whereas the dominant alleles are rare. This is because it is impossible to mask the harmful allele in a heterozygous condition. Lethal alleles cause death before the organism can reproduce. Tay-Sach’s disease is an example of lethal disorder in humans.

Expert Solution & Answer

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Answer 5

Chapter 14, Problem 8GP

Summary Introduction

To explain: The results produced in the given first cross.

Introduction: According to Mendelian inheritance, a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous condition.

Summary Introduction

To explain: The unusual ratio that has occurred in the second generation.

Introduction: In some organisms, presence of certain genes leads to the death of the organism. Those genes are known as “Lethals” or lethal genes. They can be dominant or recessive. However, recessive alleles are common, whereas the dominant alleles are rare. This is because it is impossible to mask the harmful allele in a heterozygous condition. Lethal alleles cause death before the organism can reproduce. Tay-Sach’s disease is an example of lethal disorder in humans.

Answer 6

Chapter 14, Problem 8GP

Summary Introduction

To explain: The results produced in the given first cross.

Introduction: According to Mendelian inheritance, a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous condition.

Answer 7

Chapter 14, Problem 8GP

Summary Introduction

To explain: The results produced in the given first cross.

Introduction: According to Mendelian inheritance, a single character is controlled by one or more pairs of alleles. These alleles can be either dominant or recessive. Usually, a dominant allele masks the expression of a recessive allele. A recessive allele is expressed only in homozygous condition, but a dominant allele is expressed both in homozygous and heterozygous condition.

Answer 8

Summary Introduction

To explain: The unusual ratio that has occurred in the second generation.

Introduction: In some organisms, presence of certain genes leads to the death of the organism. Those genes are known as “Lethals” or lethal genes. They can be dominant or recessive. However, recessive alleles are common, whereas the dominant alleles are rare. This is because it is impossible to mask the harmful allele in a heterozygous condition. Lethal alleles cause death before the organism can reproduce. Tay-Sach’s disease is an example of lethal disorder in humans.

Answer 9

Summary Introduction

To explain: The unusual ratio that has occurred in the second generation.

Introduction: In some organisms, presence of certain genes leads to the death of the organism. Those genes are known as “Lethals” or lethal genes. They can be dominant or recessive. However, recessive alleles are common, whereas the dominant alleles are rare. This is because it is impossible to mask the harmful allele in a heterozygous condition. Lethal alleles cause death before the organism can reproduce. Tay-Sach’s disease is an example of lethal disorder in humans.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 14 - Fill in the following diagram of a cross of...Ch. 14 - A tall pea plant is crossed with a recessive dwarf...Ch. 14 - A true-breeding tall, purple-flowered pea plant...Ch. 14 - a. In the following cross, what is the probability...Ch. 14 - Prob. 5IQ Ch. 14 - Consider an example in which the M/m gene (for...Ch. 14 - The height of spike weed is a result of polygenic...Ch. 14 - Consider the following pedigree for the trait...Ch. 14 - a. What is the probability that a mating between...Ch. 14 - If two prospective parents both have siblings who...

Solution Summary: The author explains that a single character is controlled by one or more pairs of alleles, which can be either dominant or recessive.

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