The possibility of eliminating the lethal gene in the heterozygous individual by natural selection from the population. Concept introduction: Natural selection is an important mechanisms of evolution in which the species will be better adapted to their surroundings. The alleles that are responsible for the death of an individual are called lethal alleles. They are generally due to the effect of gene mutations which are necessary for the growth and development. Depending upon the genes involved, lethal alleles can be dominant, recessive or conditional. Natural selection can eliminate the imperfect genes present in homozygous individuals by death but they cannot eliminate the imperfect genes present in heterozygous individuals as they do not have an influence in its phenotype .

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Answer 1

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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 19, Problem 6Q

Summary Introduction

To explain: The possibility of eliminating the lethal gene in the heterozygous individual by natural selection from the population.

Concept introduction: Natural selection is an important mechanisms of evolution in which the species will be better adapted to their surroundings. The alleles that are responsible for the death of an individual are called lethal alleles. They are generally due to the effect of gene mutations which are necessary for the growth and development. Depending upon the genes involved, lethal alleles can be dominant, recessive or conditional. Natural selection can eliminate the imperfect genes present in homozygous individuals by death but they cannot eliminate the imperfect genes present in heterozygous individuals as they do not have an influence in its phenotype.

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Answer 2

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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 19, Problem 6Q

Summary Introduction

To explain: The possibility of eliminating the lethal gene in the heterozygous individual by natural selection from the population.

Concept introduction: Natural selection is an important mechanisms of evolution in which the species will be better adapted to their surroundings. The alleles that are responsible for the death of an individual are called lethal alleles. They are generally due to the effect of gene mutations which are necessary for the growth and development. Depending upon the genes involved, lethal alleles can be dominant, recessive or conditional. Natural selection can eliminate the imperfect genes present in homozygous individuals by death but they cannot eliminate the imperfect genes present in heterozygous individuals as they do not have an influence in its phenotype.

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Answer 3

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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 19, Problem 6Q

Summary Introduction

To explain: The possibility of eliminating the lethal gene in the heterozygous individual by natural selection from the population.

Concept introduction: Natural selection is an important mechanisms of evolution in which the species will be better adapted to their surroundings. The alleles that are responsible for the death of an individual are called lethal alleles. They are generally due to the effect of gene mutations which are necessary for the growth and development. Depending upon the genes involved, lethal alleles can be dominant, recessive or conditional. Natural selection can eliminate the imperfect genes present in homozygous individuals by death but they cannot eliminate the imperfect genes present in heterozygous individuals as they do not have an influence in its phenotype.

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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 19, Problem 6Q

Summary Introduction