Question 1

Direction of shell coiling in Lymnaea peregra is strongly and most directly influenced by_______.

Accepted Answer

A)  the genotype of the mother 
B)  the genotype of the father 
C)  the phenotype of the mother 
D)  the phenotype of the father 
E)  the genotype of the embryo itself 
A)  the genotype of the mother 
B)  the genotype of the father 
C)  the phenotype of the mother 
D)  the phenotype of the father 
E)  the genotype of the embryo itself

Question 2

Inheritance of the green and white patches phenotype in Mirabilis jalapa (four o'clocks)is an example of maternal influence.

Accepted Answer

A) True 
 B)False

Question 3

Mitochondrial mutations are passed equally to offspring by both males and females.

Accepted Answer

A) True 
 B)False

Question 4

Kearns-Sayre syndrome (KSS)results in progressive loss of vision and hearing,as well as heart defects.What is the genetic basis for this disease?

Accepted Answer

Deletions occur in mtDNA,and t

Question 5

It appears as if the direction of shell coiling in Lymnaea peregra is influenced by the orientation of the first cleavage division.

Accepted Answer

A) True 
 B)False

Question 6

One explanation for organelle inheritance is that ________.

Accepted Answer

A)  mitochondria and chloroplasts lack DNA and are therefore dependent on the maternal cytoplasmic contributions 
B)  mitochondria and chloroplasts have DNA that is subject to mutation 
C)  organelles such as mitochondria are always wild type 
D)  chloroplasts, for example, are completely dependent on the nuclear genome for components 
E)  None of the answers listed are correct. 
A)  mitochondria and chloroplasts lack DNA and are therefore dependent on the maternal cytoplasmic contributions 
B)  mitochondria and chloroplasts have DNA that is subject to mutation 
C)  organelles such as mitochondria are always wild type 
D)  chloroplasts, for example, are completely dependent on the nuclear genome for components 
E)  None of the answers listed are correct.

Question 7

Forms of inheritance that do not follow typical Mendelian patterns and that appear to be more influenced by the parent contributing the most cytoplasm to the embryo are grouped under the general heading of ________.

Accepted Answer

A)  sex-linked inheritance 
B)  neo-Mendelian inheritance 
C)  extrachromosomal inheritance 
D)  suppressive inheritance 
E)  dominance and/or recessiveness 
A)  sex-linked inheritance 
B)  neo-Mendelian inheritance 
C)  extrachromosomal inheritance 
D)  suppressive inheritance 
E)  dominance and/or recessiveness

Question 8

Researchers in the late 1950s isolated multiple antibiotic-resistant strains of the bacterium Shigella,which causes dysentery.Such resistance was caused by nonchromosomal R factors that originated in E.coli.Which of the following forms of extrachromosomal heredity-maternal effect,organelle heredity,infectious heredity-would you consider most closely related to the transfer bacterial antibiotic-resistant strains?

Accepted Answer

The answer of Researchers in the late 1950s isolated multiple...

Question 9

Approximately one in5000 humans either have a mitochondrial DNA disorder or are at risk for developing such a disorder.What future approach involving nuclear transplantation might be available to treat mtDNA-based human disorders?

Accepted Answer

A)  nuclear disintegration 
B)  mitochondrial swapping 
C)  nuclear activation 
D)  mitochondrial activation 
E)  mitochondrial suppression 
A)  nuclear disintegration 
B)  mitochondrial swapping 
C)  nuclear activation 
D)  mitochondrial activation 
E)  mitochondrial suppression

Question 10

How are reciprocal crosses used to identify cases of extrachromosomal inheritance? What criteria would one use to state that a particular mode of inheritance is extrachromosomal?

Accepted Answer

In cases of extrachromosomal inheritance

Question 11

Which of the following organelles are involved in the general category of organelle heredity?

Accepted Answer

A)  mitochondria and chloroplasts 
B)  golgi and nuclei 
C)  lysosomes and peroxisomes 
D)  factors and episomes 
E)  golgi and rough endoplasmic reticulum 
A)  mitochondria and chloroplasts 
B)  golgi and nuclei 
C)  lysosomes and peroxisomes 
D)  factors and episomes 
E)  golgi and rough endoplasmic reticulum

Question 12

Name two human disorders that appear to be transmitted extrachromosomally.

Accepted Answer

myoclonic epilepsy a

Question 13

To which of the following does the term heteroplasmy refer?

Accepted Answer

A)  cells with a variable mixture of normal and abnormal organelles 
B)  heterozygous individuals with more than one gene pair involved 
C)  conditions in which the germ plasm is a mixture of dominant and recessive genes 
D)  a circumstance that is homologous to incomplete dominance 
E)  various stages of development of mitochondria and chloroplasts 
A)  cells with a variable mixture of normal and abnormal organelles 
B)  heterozygous individuals with more than one gene pair involved 
C)  conditions in which the germ plasm is a mixture of dominant and recessive genes 
D)  a circumstance that is homologous to incomplete dominance 
E)  various stages of development of mitochondria and chloroplasts

Question 14

The genes for light eyes (lt; light)and straw bristles (stw; straw)are tightly linked on chromosome 2 in Drosophila melanogaster.The Malpighian tubes of lt larvae and adults are maternally affected in that Malpighian tubes of lt/lt organisms,whose mothers were lt⁺/ˡᵗ and have more yellow pigment than those from lt/lt mothers.There is no maternal effect associated with the straw locus.Give the phenotypes of the offspring from the following crosses.
$\begin{array}{lll}
& \underline{\text { Female }} & \underline{\text { Male }} \
\text { Cross \#1: } & l t \text { stw/lt stw } & l t^{+} \text {stw } w^{+} / l t \text { stw } \
\text { Cross \#2: } & l t^{+} s t w / l t \text { stw } & l t \text { stw } w^{+} / l t s t w \
\text { Cross \#3: } &l t^{+} s t w w^{+} / l t \text { stw } & \text { lt stw/lt stw }
\end{array}$

Accepted Answer

Cross #1: 1/2 light Malpighian

Question 15

Why is variegation in four o'clock plants determined by the phenotype of the ovule source?

Accepted Answer

The chloroplasts determine the

Question 16

Maternal-effect patterns result when nuclear gene products controlled by the maternal genotype condition the egg and influence early development.Give two examples of maternal effects.

Accepted Answer

Ephestia p

Question 17

In what way do segregational petite mutations differ from neutral petites?

Accepted Answer

Segregational petites follow M

Direction of shell coiling in Lymnaea peregra is strongly and most directly influenced by_______.

Inheritance of the green and white patches phenotype in Mirabilis jalapa (four o'clocks)is an example of maternal influence.

Mitochondrial mutations are passed equally to offspring by both males and females.

Kearns-Sayre syndrome (KSS)results in progressive loss of vision and hearing,as well as heart defects.What is the genetic basis for this disease?

It appears as if the direction of shell coiling in Lymnaea peregra is influenced by the orientation of the first cleavage division.

One explanation for organelle inheritance is that ________.

Forms of inheritance that do not follow typical Mendelian patterns and that appear to be more influenced by the parent contributing the most cytoplasm to the embryo are grouped under the general heading of ________.

Approximately one in5000 humans either have a mitochondrial DNA disorder or are at risk for developing such a disorder.What future approach involving nuclear transplantation might be available to treat mtDNA-based human disorders?

How are reciprocal crosses used to identify cases of extrachromosomal inheritance? What criteria would one use to state that a particular mode of inheritance is extrachromosomal?

Which of the following organelles are involved in the general category of organelle heredity?

Name two human disorders that appear to be transmitted extrachromosomally.

To which of the following does the term heteroplasmy refer?

Why is variegation in four o'clock plants determined by the phenotype of the ovule source?

Maternal-effect patterns result when nuclear gene products controlled by the maternal genotype condition the egg and influence early development.Give two examples of maternal effects.

In what way do segregational petite mutations differ from neutral petites?

Introduction to Genetics

Mitosis and Meiosis

Mendelian Genetics

Extensions of Mendelian Genetics

Chromosome Mapping in Eukaryotes

Genetic Analysis and Mapping in Bacteria and Bacteriophages

Sex Determination and Sex Chromosomes

Chromosome Mutations: Variation in Number and Arrangement

DNA Structure and Analysis

DNA Replication and Recombination

DNA Organization in Chromosomes

The Genetic Code and Transcription

Translation and Proteins

Gene Mutation,dna Repair,and Transposition

Regulation of Gene Expression in Prokaryotes

Regulation of Gene Expression in Eukaryotes

Developmental Genetics

Cancer and Regulation of the Cell Cycle

Recombinant DNA Technology

Genomics, bioinformatics, and Proteomics

Applications and Ethics of Genetic Engineering and Biotechnology

Quantitative Genetics and Multifactorial Traits

Neurogenetics

Population and Evolutionary Genetics

Filters

Exam 9: Extranuclear Inheritance

Direction of shell coiling in Lymnaea peregra is strongly and most directly influenced by_______.

Inheritance of the green and white patches phenotype in Mirabilis jalapa (four o'clocks)is an example of maternal influence.

Mitochondrial mutations are passed equally to offspring by both males and females.

Kearns-Sayre syndrome (KSS)results in progressive loss of vision and hearing,as well as heart defects.What is the genetic basis for this disease?

It appears as if the direction of shell coiling in Lymnaea peregra is influenced by the orientation of the first cleavage division.

One explanation for organelle inheritance is that ________.

Forms of inheritance that do not follow typical Mendelian patterns and that appear to be more influenced by the parent contributing the most cytoplasm to the embryo are grouped under the general heading of ________.

Approximately one in5000 humans either have a mitochondrial DNA disorder or are at risk for developing such a disorder.What future approach involving nuclear transplantation might be available to treat mtDNA-based human disorders?

How are reciprocal crosses used to identify cases of extrachromosomal inheritance? What criteria would one use to state that a particular mode of inheritance is extrachromosomal?

Which of the following organelles are involved in the general category of organelle heredity?

Name two human disorders that appear to be transmitted extrachromosomally.

To which of the following does the term heteroplasmy refer?

Why is variegation in four o'clock plants determined by the phenotype of the ovule source?

Maternal-effect patterns result when nuclear gene products controlled by the maternal genotype condition the egg and influence early development.Give two examples of maternal effects.

In what way do segregational petite mutations differ from neutral petites?

Introduction to Genetics

Mitosis and Meiosis

Mendelian Genetics

Extensions of Mendelian Genetics

Chromosome Mapping in Eukaryotes

Genetic Analysis and Mapping in Bacteria and Bacteriophages

Sex Determination and Sex Chromosomes

Chromosome Mutations: Variation in Number and Arrangement

DNA Structure and Analysis

DNA Replication and Recombination

DNA Organization in Chromosomes

The Genetic Code and Transcription

Translation and Proteins

Gene Mutation,dna Repair,and Transposition

Regulation of Gene Expression in Prokaryotes

Regulation of Gene Expression in Eukaryotes

Developmental Genetics

Cancer and Regulation of the Cell Cycle

Recombinant DNA Technology

Genomics, bioinformatics, and Proteomics

Applications and Ethics of Genetic Engineering and Biotechnology

Quantitative Genetics and Multifactorial Traits

Neurogenetics

Population and Evolutionary Genetics

Filters