Question 1

Which type of chromosome mutation is responsible for familial Down syndrome?

Accepted Answer

A) Disomy 
B) Inversion 
C) Nondisjunction 
D) Polyploidy 
E) Translocation 
A) Disomy 
B) Inversion 
C) Nondisjunction 
D) Polyploidy 
E) Translocation E

Question 2

Which type of chromosome has the centromere near one end, producing a long arm and a knob?

Accepted Answer

A) Acrocentric 
B) Metacentric 
C) Paracentric 
D) Submetacentric 
E) Telocentric 
A) Acrocentric 
B) Metacentric 
C) Paracentric 
D) Submetacentric 
E) Telocentric A

Question 3

List the four basic types of chromosome rearrangements.

Accepted Answer

Deletions, duplications, inversions, and translocations.

Question 4

Which type of chromosome mutation results in a chromosome segment that is turned 180 degrees?

Accepted Answer

A) Deletion 
B) Duplication 
C) Inversion 
D) Translocation 
E) Transversion 
A) Deletion 
B) Duplication 
C) Inversion 
D) Translocation 
E) Transversion

Question 5

Which of the following is NOT a form of aneuploidy in diploid organisms?

Accepted Answer

A) Nullisomy 
B) Monosomy 
C) Disomy 
D) Trisomy 
E) Tetrasomy 
A) Nullisomy 
B) Monosomy 
C) Disomy 
D) Trisomy 
E) Tetrasomy

Question 6

Wild-type Arabidopsis has five chromosomes (2n = 10).Trisomic plants are designated as Tr followed by the trisomic chromosome number-that is, Tr1 is trisomic for chromosome 1.Assuming that trisomy is fully viable and that all possible pairing configurations (including nonpairing)are possible at meiosis, what proportion of the progeny from the cross Tr1;Tr2 × Tr1;Tr2 will have a wild-type chromosomal complement?

Accepted Answer

A) 1/2 
B) 1/3 
C) 1/4 
D) 1/9 
E) 1/81 
A) 1/2 
B) 1/3 
C) 1/4 
D) 1/9 
E) 1/81

Question 7

The complete set of chromosomes possessed by an organism is called a:

Accepted Answer

A) polyploid. 
B) chromatin complement. 
C) karyotype. 
D) phenotype. 
E) diploid. 
A) polyploid. 
B) chromatin complement. 
C) karyotype. 
D) phenotype. 
E) diploid.

Question 8

What type of organism results from the hybridization of a haploid gamete from one species with a diploid gamete from a different species?

Accepted Answer

A) Allodiploid 
B) Allotriploid 
C) Autotriploid 
D) Allotetraploid 
E) Autotetraploid 
A) Allodiploid 
B) Allotriploid 
C) Autotriploid 
D) Allotetraploid 
E) Autotetraploid

Question 9

Which type of chromosome has the centromere at or very near the end?

Accepted Answer

A) Acrocentric 
B) Metacentric 
C) Paracentric 
D) Submetacentric 
E) Telocentric 
A) Acrocentric 
B) Metacentric 
C) Paracentric 
D) Submetacentric 
E) Telocentric

Question 10

A newly discovered species of dung beetle has 2n = 16 chromosomes.It mates with a closely related beetle species that has 2n = 12 chromosomes.How many chromosomes would there be in an amphidiploid beetle produced from this cross?

Accepted Answer

A) 12 
B) 14 
C) 16 
D) 28 
E) 12 or 16 
A) 12 
B) 14 
C) 16 
D) 28 
E) 12 or 16

Question 11

Explain the genetic basis for sterility in autopolyploid organisms.

Accepted Answer

The result is that some of the chromosom

Question 12

An explorer stumbled upon a remote valley and found plants that produced a colorful, sweet fruit.Many of these plants were autopolyploid and came in varieties that differed by their ploidy and the size of fruit that was produced.Which of the following plant genomes would MOST likely produce the largest fruit?

Accepted Answer

A) Diploid (2n) 
B) Triploid (3n) 
C) Tetraploid (4n) 
D) Hexaploid (6n) 
E) Octaploid (8n) 
A) Diploid (2n) 
B) Triploid (3n) 
C) Tetraploid (4n) 
D) Hexaploid (6n) 
E) Octaploid (8n)

Question 13

_____ can cause genes to move from one linkage group to another.

Accepted Answer

A) Inversions 
B) Deletions 
C) Polyploidy 
D) Translocations 
E) Unequal crossing over 
A) Inversions 
B) Deletions 
C) Polyploidy 
D) Translocations 
E) Unequal crossing over

Question 14

Which of the following concepts is NOT associated with differences in the number of copies of particular DNA sequences?

Accepted Answer

A) Chromosome deletions 
B) Chromosome duplications 
C) Chromosome inversion 
D) Red-green color blindness in humans 
E) Bar phenotype in Drosophila 
A) Chromosome deletions 
B) Chromosome duplications 
C) Chromosome inversion 
D) Red-green color blindness in humans 
E) Bar phenotype in Drosophila

Question 15

Which type of chromosome mutation increases the amount of genetic material?

Accepted Answer

A) Deletion 
B) Duplication 
C) Inversion 
D) Translocation 
E) Transversion 
A) Deletion 
B) Duplication 
C) Inversion 
D) Translocation 
E) Transversion

Question 16

Which type of polyploidy is synonymous with amphidiploid?

Accepted Answer

A) Allodiploid 
B) Allotriploid 
C) Autotriploid 
D) Allotetraploid 
E) Autotetraploid 
A) Allodiploid 
B) Allotriploid 
C) Autotriploid 
D) Allotetraploid 
E) Autotetraploid

Question 17

Which type of chromosome mutation INCREASES the amount of genetic material for all chromosomes?

Accepted Answer

A) Translocation 
B) Aneuploidy 
C) Polyploidy 
D) Inversion 
E) Transversion 
A) Translocation 
B) Aneuploidy 
C) Polyploidy 
D) Inversion 
E) Transversion

Question 18

You are studying two different mutant fish lines (A and

Accepted Answer

In Mutant B nondisjunction occ

Question 19

How is colchicine useful for studying chromosomal mutations?

Accepted Answer

A) Colchicine inhibits microtubule polymerization, which stalls cells in metaphase with condensed chromosomes that can be observed with a microscope. 
B) Colchicine induces chromosome condensation during interphase, which allows the visualization of interphase chromosomes. 
C) Colchicine causes chromosomal breakage, leading to inversions and translocations that can be observed with a microscope. 
D) Colchicine aids in the formation of microtubules during mitosis, which promotes anaphase and completion of the cell cycle. 
E) Colchicine is an inhibitor of oxidative phosphorylation.Reduced mitochondrial function slows down mitosis and increases the number of metaphase cells. 
A) Colchicine inhibits microtubule polymerization, which stalls cells in metaphase with condensed chromosomes that can be observed with a microscope. 
B) Colchicine induces chromosome condensation during interphase, which allows the visualization of interphase chromosomes. 
C) Colchicine causes chromosomal breakage, leading to inversions and translocations that can be observed with a microscope. 
D) Colchicine aids in the formation of microtubules during mitosis, which promotes anaphase and completion of the cell cycle. 
E) Colchicine is an inhibitor of oxidative phosphorylation.Reduced mitochondrial function slows down mitosis and increases the number of metaphase cells.

Question 20

A man has a condition where all of his gametes undergo nondisjunction of the sex chromosomes in meiosis I, but meiosis II proceeds normally.He mates with a woman who produces all normal gametes.What is the probability that the fertilized egg will develop into a child with Klinefelter syndrome (XXY)? Assume that all gametes and zygotes are viable.

Accepted Answer

A) 1/8 
B) 1/4 
C) 1/3 
D) 1/2 
E) 0 
A) 1/8 
B) 1/4 
C) 1/3 
D) 1/2 
E) 0

Which type of chromosome mutation is responsible for familial Down syndrome?

Which type of chromosome has the centromere near one end, producing a long arm and a knob?

List the four basic types of chromosome rearrangements.

Which type of chromosome mutation results in a chromosome segment that is turned 180 degrees?

Which of the following is NOT a form of aneuploidy in diploid organisms?

The complete set of chromosomes possessed by an organism is called a:

What type of organism results from the hybridization of a haploid gamete from one species with a diploid gamete from a different species?

Which type of chromosome has the centromere at or very near the end?

A newly discovered species of dung beetle has 2n = 16 chromosomes.It mates with a closely related beetle species that has 2n = 12 chromosomes.How many chromosomes would there be in an amphidiploid beetle produced from this cross?

Explain the genetic basis for sterility in autopolyploid organisms.

_____ can cause genes to move from one linkage group to another.

Which of the following concepts is NOT associated with differences in the number of copies of particular DNA sequences?

Which type of chromosome mutation increases the amount of genetic material?

Which type of polyploidy is synonymous with amphidiploid?

Which type of chromosome mutation INCREASES the amount of genetic material for all chromosomes?

You are studying two different mutant fish lines (A and

How is colchicine useful for studying chromosomal mutations?

Introduction to Genetics

Chromosomes and Cellular Reproduction

Basic Principles of Heredity

Sex Determination and Sex-Linked Characteristics

Linkage, Recombination, and Eukaryotic Gene Mapping

Bacterial and Viral Genetic Systems

DNA- the Chemical Nature of the Gene

DNA Replication and Recombination

From DNA to Proteins- Transcription and Rna Processing

From DNA to Protein- Translation

Control of Gene Expression

Gene Mutations, Transposable Elements, and Dna Repair

Molecular Genetic Analysis and Biotechnology

Genomics and Proteomics

Cancer Genetics

Quantitative Genetics

Population and Evolutionary Genetics

Filters

Exam 6: Chromosome Variation

Which type of chromosome mutation is responsible for familial Down syndrome?

Which type of chromosome has the centromere near one end, producing a long arm and a knob?

List the four basic types of chromosome rearrangements.

Which type of chromosome mutation results in a chromosome segment that is turned 180 degrees?

Which of the following is NOT a form of aneuploidy in diploid organisms?

The complete set of chromosomes possessed by an organism is called a:

What type of organism results from the hybridization of a haploid gamete from one species with a diploid gamete from a different species?

Which type of chromosome has the centromere at or very near the end?

A newly discovered species of dung beetle has 2n = 16 chromosomes.It mates with a closely related beetle species that has 2n = 12 chromosomes.How many chromosomes would there be in an amphidiploid beetle produced from this cross?

Explain the genetic basis for sterility in autopolyploid organisms.

_____ can cause genes to move from one linkage group to another.

Which of the following concepts is NOT associated with differences in the number of copies of particular DNA sequences?

Which type of chromosome mutation increases the amount of genetic material?

Which type of polyploidy is synonymous with amphidiploid?

Which type of chromosome mutation INCREASES the amount of genetic material for all chromosomes?

You are studying two different mutant fish lines (A and

How is colchicine useful for studying chromosomal mutations?

Introduction to Genetics

Chromosomes and Cellular Reproduction

Basic Principles of Heredity

Sex Determination and Sex-Linked Characteristics

Linkage, Recombination, and Eukaryotic Gene Mapping

Bacterial and Viral Genetic Systems

DNA- the Chemical Nature of the Gene

DNA Replication and Recombination

From DNA to Proteins- Transcription and Rna Processing

From DNA to Protein- Translation

Control of Gene Expression

Gene Mutations, Transposable Elements, and Dna Repair

Molecular Genetic Analysis and Biotechnology

Genomics and Proteomics

Cancer Genetics

Quantitative Genetics

Population and Evolutionary Genetics

Filters