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 .

Question

Want to see the full answer?

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 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.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

19. On the diagram below a. Label the three pictures as: DNA; polypeptide; or RNA. b. Label the arrows as: translation or transcription/RNA processing. c. Add the following details to the diagram. Promoter region TATA box Transcription start site Transcription terminator Intron (A,B,C,D) Exons (1,2,3,4,5) Splice sites 5' cap 5' UTR (untranslated region) 3' poly A tail 3' UTR (untranslated region) Translational start (AUG) Translational stop (UGA, UAG, or UAA) N and C ends of polypeptide 0000

Match the letter labels in the figure below to the terms. Some letter labels are not used. MNNNNNNIN M C B A M D F E H K G 8

The diagram below illustrates a quorum sensing pathway from Staphylococcus aureus. Please answer the following questions. 1. Autoinduction is part of the quorum sensing system. Which promoter (P2 or P3) is critical for autoinduction? 2)This staphylococcus aureus grows on human wounds, causing severe infections. You would like to start a clinical trial to treat these wound infections. Please describe: a) What molecule do you recommend for the trial. Why? b) Your trial requires that Staphylococcus aureus be isolated from the wound and submitted to genome sequencing before admittance. Why? What are you testing for? 3) If a mutation arises where the Promoter P3 is constitutively active, how would that influence sensitivity to AIP? Please explain your rationale. 4) This pathway is sensitive to bacterial cell density. Describe two separate mutation that would render the pathway active independent of cell density. Briefly explain your rationale. Mutation 1 Mutation 2

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 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.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

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 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.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

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