Question 1

Do the protein-coding parts of organelle genes more closely resemble those of Bacteria (Eubacteria)or Archaea?

Accepted Answer

The answer of Do the protein-coding parts of organelle genes...

Question 2

Mating in Chlamydomonas occurs between haploid mt⁺ and mt⁻ individuals.The mt⁻ chloroplast genome is selectively degraded 95% of the time.In one such mating,the mt⁺ genome is strᴿ and mt⁻ is strˢ.Will offspring live or die if they are exposed to streptomycin?

Accepted Answer

The answer of Mating in Chlamydomonas occurs between haploid mt⁺...

Question 3

Extrachromosomal inheritance includes organelle inheritance,infectious inheritance,and maternal effectsthat is,anything transmitted through the cytosol.In infectious heredity,the infecting pathogen is cytoplasmic.What other non-Mendelian characteristic(s)must also occur?

Accepted Answer

A) infection of specific organelles 
B) transfer of the pathogen's genes to the host nucleus 
C) transfer of the pathogen's genes to the organelles 
D) infection passing from maternal cytoplasm to egg cytoplasm 
E) infection passing from maternal nucleus to egg nucleus 
A) infection of specific organelles 
B) transfer of the pathogen's genes to the host nucleus 
C) transfer of the pathogen's genes to the organelles 
D) infection passing from maternal cytoplasm to egg cytoplasm 
E) infection passing from maternal nucleus to egg nucleus

Question 4

A consequence of organelle heredity is that sequence changes in mtDNA vary more than nuclear DNA in response to reduction in population size.Which of the following does this imply about human evolutionary history?

Accepted Answer

A) Current human populations must have a much higher mutation rate than ancient populations. 
B) Mitochondrial variants in people descending from originally small populations show enough diversity to be used to construct an evolutionary tree. 
C) The original human population must have grown to be quite large before its members began migrating to other lands and other continents. 
D) Nuclear gene sequencing must be used to resolve the question of human ancestral origins. 
E) A single human population,living about 200,000 years ago,could not have given rise to all current human populations. 
A) Current human populations must have a much higher mutation rate than ancient populations. 
B) Mitochondrial variants in people descending from originally small populations show enough diversity to be used to construct an evolutionary tree. 
C) The original human population must have grown to be quite large before its members began migrating to other lands and other continents. 
D) Nuclear gene sequencing must be used to resolve the question of human ancestral origins. 
E) A single human population,living about 200,000 years ago,could not have given rise to all current human populations.

Question 5

In plants,cytoplasmic male sterility (CMS)is maternally inherited due to mutations in mitochondria.However,these can revert to normal due to a nuclear gene for restoration of fertility (RF).The recessive rf/rf condition does not restore fertility.If the female parent of a male plant is CMS rf/rf and the male parent is normal (N)Rf/Rf,will male progeny be sterile or fertile?

Accepted Answer

The answer of In plants,cytoplasmic male sterility (CMS)is maternally inherited...

Question 6

Three of the four modes of inheritance of organelle genes are
• maternal inheritance as in mammals
• paternal inheritance as in gymnosperms
• selective degradation of one source during mating.
What is the fourth?

Accepted Answer

biparental

Question 7

Random segregation of organelles during cell division is likely to result in an increased rate of which of the following?

Accepted Answer

A) incomplete penetrance 
B) dominant loss-of-function mutations 
C) dominant gain-of-function mutations 
D) chromosomal duplication mutations 
E) chromosomal deletion mutations 
A) incomplete penetrance 
B) dominant loss-of-function mutations 
C) dominant gain-of-function mutations 
D) chromosomal duplication mutations 
E) chromosomal deletion mutations

Question 8

Among current bacteria,those with the most in common with mitochondria are the Rickettsia (that cause typhus).What does this mean about Rickettsia's place in the evolution of endosymbiosis?

Accepted Answer

Because Rickettsia more closely resemble

Question 9

How can you establish that,in a newly described species of plant,a particular phenotype is due to a chloroplast rather than a nuclear gene?

Accepted Answer

Mutations in chloroplast genes violate M

Question 10

Sequencing of genomes of eukaryotes,both mitochondrial and nuclear,have revealed evidence of sequence transfer from one to the other.Are such transfers ancient,recent,or both?

Accepted Answer

The answer of Sequencing of genomes of eukaryotes,both mitochondrial and...

Do the protein-coding parts of organelle genes more closely resemble those of Bacteria (Eubacteria)or Archaea?

Mating in Chlamydomonas occurs between haploid mt⁺ and mt⁻ individuals.The mt⁻ chloroplast genome is selectively degraded 95% of the time.In one such mating,the mt⁺ genome is strᴿ and mt⁻ is strˢ.Will offspring live or die if they are exposed to streptomycin?

Extrachromosomal inheritance includes organelle inheritance,infectious inheritance,and maternal effectsthat is,anything transmitted through the cytosol.In infectious heredity,the infecting pathogen is cytoplasmic.What other non-Mendelian characteristic(s)must also occur?

A consequence of organelle heredity is that sequence changes in mtDNA vary more than nuclear DNA in response to reduction in population size.Which of the following does this imply about human evolutionary history?

Three of the four modes of inheritance of organelle genes are • maternal inheritance as in mammals • paternal inheritance as in gymnosperms • selective degradation of one source during mating. What is the fourth?

Random segregation of organelles during cell division is likely to result in an increased rate of which of the following?

Among current bacteria,those with the most in common with mitochondria are the Rickettsia (that cause typhus).What does this mean about Rickettsia's place in the evolution of endosymbiosis?

How can you establish that,in a newly described species of plant,a particular phenotype is due to a chloroplast rather than a nuclear gene?

Sequencing of genomes of eukaryotes,both mitochondrial and nuclear,have revealed evidence of sequence transfer from one to the other.Are such transfers ancient,recent,or both?

The Molecular Basis of Heredity, Variation, and Evolution

Transmission Genetics

Cell Division and Chromosome Heredity

Gene Interaction

Genetic Linkage and Mapping in Eukaryotes

Genetic Analysis and Mapping in Bacteria and Bacteriophage

DNA Structure and Replication

Molecular Biology and Transcription and Rna Processing

The Molecular Biology of Translation

The Integration of Genetic Approaches: Understanding Sickle Cell Disease

Chromosome Structure

Gene Mutation, DNA Repair, and Homologous Recombination

Chromosome Aberrations and Transposition

Regulation of Gene Expression in Bacteria and Bacteriophage

Regulation of Gene Expression in Eukaryotes

Forward Genetics and Recombinant DNA Technology

Applications of Recombinant DNA Technology and Reverse Genetics

Genomics: Genetics From a Whole-Genome Perspective

Developmental Genetics

Genetic Analysis of Quantitative Traits

Population Genetics and Evolution

Filters

Exam 19: Cytoplasmic Inheritance and the Evolution of Organelle Genomes

Do the protein-coding parts of organelle genes more closely resemble those of Bacteria (Eubacteria)or Archaea?

Mating in Chlamydomonas occurs between haploid mt⁺ and mt⁻ individuals.The mt⁻ chloroplast genome is selectively degraded 95% of the time.In one such mating,the mt⁺ genome is strᴿ and mt⁻ is strˢ.Will offspring live or die if they are exposed to streptomycin?

Extrachromosomal inheritance includes organelle inheritance,infectious inheritance,and maternal effectsthat is,anything transmitted through the cytosol.In infectious heredity,the infecting pathogen is cytoplasmic.What other non-Mendelian characteristic(s)must also occur?

A consequence of organelle heredity is that sequence changes in mtDNA vary more than nuclear DNA in response to reduction in population size.Which of the following does this imply about human evolutionary history?

Three of the four modes of inheritance of organelle genes are • maternal inheritance as in mammals • paternal inheritance as in gymnosperms • selective degradation of one source during mating. What is the fourth?

Random segregation of organelles during cell division is likely to result in an increased rate of which of the following?

Among current bacteria,those with the most in common with mitochondria are the Rickettsia (that cause typhus).What does this mean about Rickettsia's place in the evolution of endosymbiosis?

How can you establish that,in a newly described species of plant,a particular phenotype is due to a chloroplast rather than a nuclear gene?

Sequencing of genomes of eukaryotes,both mitochondrial and nuclear,have revealed evidence of sequence transfer from one to the other.Are such transfers ancient,recent,or both?

The Molecular Basis of Heredity, Variation, and Evolution

Transmission Genetics

Cell Division and Chromosome Heredity

Gene Interaction

Genetic Linkage and Mapping in Eukaryotes

Genetic Analysis and Mapping in Bacteria and Bacteriophage

DNA Structure and Replication

Molecular Biology and Transcription and Rna Processing

The Molecular Biology of Translation

The Integration of Genetic Approaches: Understanding Sickle Cell Disease

Chromosome Structure

Gene Mutation, DNA Repair, and Homologous Recombination

Chromosome Aberrations and Transposition

Regulation of Gene Expression in Bacteria and Bacteriophage

Regulation of Gene Expression in Eukaryotes

Forward Genetics and Recombinant DNA Technology

Applications of Recombinant DNA Technology and Reverse Genetics

Genomics: Genetics From a Whole-Genome Perspective

Developmental Genetics

Genetic Analysis of Quantitative Traits

Population Genetics and Evolution

Filters