Question 1

Polyploids created by chromosome duplication within a species are known as:

Accepted Answer

A)  Autopolyploids 
B)  Allopolyploids 
C)  Triploids 
D)  Tetraploids 
E)  None of these 
A)  Autopolyploids 
B)  Allopolyploids 
C)  Triploids 
D)  Tetraploids 
E)  None of these

Question 2

An organism in which one chromosome or chromosome segment is overrepresented is referred to as a:

Accepted Answer

A)  Hypoploid 
B)  Hyperploid 
C)  Polyploid 
D)  Autopolyploid 
E)  Allopolyploid 
A)  Hypoploid 
B)  Hyperploid 
C)  Polyploid 
D)  Autopolyploid 
E)  Allopolyploid

Question 3

Briefly explain the cause of Down Syndrome and why the incidence rate increases with maternal age.

Accepted Answer

Trisomy 21 can be caused by chromosome n

Question 4

Organisms in which one chromosome is either under- or overrepresented are termed:

Accepted Answer

A)  Aneuploid 
B)  Euploid 
C)  Polyploid 
D)  Diploid 
E)  Haploid 
A)  Aneuploid 
B)  Euploid 
C)  Polyploid 
D)  Diploid 
E)  Haploid

Question 5

The pattern of bands within a chromosome is termed:

Accepted Answer

A)  Karyotype 
B)  Chromogram 
C)  Ideogram 
D)  Sonogram 
E)  None of these 
A)  Karyotype 
B)  Chromogram 
C)  Ideogram 
D)  Sonogram 
E)  None of these

Question 6

The human diploid cell has ______ pairs of chromosomes.

Accepted Answer

A)  12 
B)  23 
C)  24 
D)  46 
E)  48 
A)  12 
B)  23 
C)  24 
D)  46 
E)  48

Question 7

An organism in which one chromosome is underrepresented is referred to as a:

Accepted Answer

A)  Hypoploid 
B)  Hyperploid 
C)  Polyploid 
D)  Autopolyploid 
E)  Allopolyploid 
A)  Hypoploid 
B)  Hyperploid 
C)  Polyploid 
D)  Autopolyploid 
E)  Allopolyploid

Question 8

If a cytogeneticist refers to the 7p region of a chromosome,he/she is referring to the:

Accepted Answer

A)  Short arm on chromosome 7 
B)  Long arm on chromosome 7 
C)  7th band on chromosome P 
D)  P band on chromosome 7 
E)  7th band on the short arm of chromosome 1 
A)  Short arm on chromosome 7 
B)  Long arm on chromosome 7 
C)  7th band on chromosome P 
D)  P band on chromosome 7 
E)  7th band on the short arm of chromosome 1

Question 9

By labeling chromosomes with various DNA probes it is possible to: 1.Locate individual gene sequences on a chromosome
2)Compare the similarities between human DNA and another mammal's DNA
3)Observe any abnormalities in the chromosome structure

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  1 and 3 
E)  All of these 
A)  1 
B)  2 
C)  3 
D)  1 and 3 
E)  All of these

Question 10

Explain how chromosomes that have undergone reciprocal translocation most often pair during meiosis

Accepted Answer

During meiosis,these translocated chromo

Question 11

In which phase of the cell cycle is a polytene chromosome most likely to be found?

Accepted Answer

A)  Interphase 
B)  Prophase 
C)  Metaphase 
D)  Anaphase 
E)  Telophase 
A)  Interphase 
B)  Prophase 
C)  Metaphase 
D)  Anaphase 
E)  Telophase

Question 12

Which of the following terms implies a genetic imbalance?

Accepted Answer

A)  Aneuploid 
B)  Polyploid 
C)  Diploid 
D)  Aneuploid and Polyploid 
E)  All of these 
A)  Aneuploid 
B)  Polyploid 
C)  Diploid 
D)  Aneuploid and Polyploid 
E)  All of these

Question 13

Which of the following best explains the formation of polytene chromosomes?

Accepted Answer

A)  Successive rounds of chromosome replication occur without intervening cell divisions 
B)  Successive rounds of chromosome replication occur with multiple rounds of intervening cell divisions 
C)  Few rounds of chromosome replication with multiple rounds of intervening cell divisions 
D)  All of these 
E)  None of these 
A)  Successive rounds of chromosome replication occur without intervening cell divisions 
B)  Successive rounds of chromosome replication occur with multiple rounds of intervening cell divisions 
C)  Few rounds of chromosome replication with multiple rounds of intervening cell divisions 
D)  All of these 
E)  None of these

Question 14

Which of the following is an effect of polyploidy?

Accepted Answer

A)  Increased cell size 
B)  Increased organism size 
C)  Organisms that are more robust 
D)  Increased cell size and Organisms that are more robust 
E)  All of these 
A)  Increased cell size 
B)  Increased organism size 
C)  Organisms that are more robust 
D)  Increased cell size and Organisms that are more robust 
E)  All of these

Question 15

The long arm of the chromosome is designated:

Accepted Answer

A)  P 
B)  Q 
C)  L 
D)  M 
E)  N 
A)  P 
B)  Q 
C)  L 
D)  M 
E)  N

Question 16

In a polyploidy organism,sometimes three homologues synapse and partially pair with each of the others forming a(an):

Accepted Answer

A)  Univalent 
B)  Bivalent 
C)  Trivalent 
D)  Trisomic 
E)  Hectovalent 
A)  Univalent 
B)  Bivalent 
C)  Trivalent 
D)  Trisomic 
E)  Hectovalent

Question 17

Which technique creates colorful chromosome images by treating chromosome spreads with fluorescently labeled DNA fragments that have been isolated and characterized in the laboratory?

Accepted Answer

A)  Giemsa staining 
B)  Quinacrine staining 
C)  Gram staining 
D)  Chromosome painting 
E)  Classical karyotyping 
A)  Giemsa staining 
B)  Quinacrine staining 
C)  Gram staining 
D)  Chromosome painting 
E)  Classical karyotyping

Question 18

The presence of an extra chromosome segment,such as the X chromosome segment in Drosophila that codes for the Bar-eye mutation,is known as:

Accepted Answer

A)  Deletion 
B)  Duplication 
C)  Hypoploidy 
D)  Polyploidy 
E)  Trisomy 
A)  Deletion 
B)  Duplication 
C)  Hypoploidy 
D)  Polyploidy 
E)  Trisomy

Question 19

When polyploid formation occurs without the separation of sister chromatids and the duplicated chromosomes pile up next to each other,forming a bundle of strands,the chromosomes are said to be:

Accepted Answer

A)  Polyploidy 
B)  Polymitotic 
C)  Polytene 
D)  Aneuploidic 
E)  Tetraploidic 
A)  Polyploidy 
B)  Polymitotic 
C)  Polytene 
D)  Aneuploidic 
E)  Tetraploidic

Question 20

Which of the following is the most commonly used differential stain for chromosome analysis?

Accepted Answer

A)  Giesma 
B)  Quinacrine 
C)  Crystal Violet 
D)  Giema and Quinacrine 
E)  All of these 
A)  Giesma 
B)  Quinacrine 
C)  Crystal Violet 
D)  Giema and Quinacrine 
E)  All of these

Exam 6: Variation In Chromosome Number And Structure

Polyploids created by chromosome duplication within a species are known as:

An organism in which one chromosome or chromosome segment is overrepresented is referred to as a:

Briefly explain the cause of Down Syndrome and why the incidence rate increases with maternal age.

Organisms in which one chromosome is either under- or overrepresented are termed:

The pattern of bands within a chromosome is termed:

The human diploid cell has ______ pairs of chromosomes.

An organism in which one chromosome is underrepresented is referred to as a:

If a cytogeneticist refers to the 7p region of a chromosome,he/she is referring to the:

By labeling chromosomes with various DNA probes it is possible to: 1.Locate individual gene sequences on a chromosome 2)Compare the similarities between human DNA and another mammal's DNA 3)Observe any abnormalities in the chromosome structure

Explain how chromosomes that have undergone reciprocal translocation most often pair during meiosis

In which phase of the cell cycle is a polytene chromosome most likely to be found?

Which of the following terms implies a genetic imbalance?

Which of the following best explains the formation of polytene chromosomes?

Which of the following is an effect of polyploidy?

The long arm of the chromosome is designated:

In a polyploidy organism,sometimes three homologues synapse and partially pair with each of the others forming a(an):

Which technique creates colorful chromosome images by treating chromosome spreads with fluorescently labeled DNA fragments that have been isolated and characterized in the laboratory?

The presence of an extra chromosome segment,such as the X chromosome segment in Drosophila that codes for the Bar-eye mutation,is known as:

When polyploid formation occurs without the separation of sister chromatids and the duplicated chromosomes pile up next to each other,forming a bundle of strands,the chromosomes are said to be:

Which of the following is the most commonly used differential stain for chromosome analysis?

The Science Of Genetics

Cellular Reproduction

Mendelism The Basic Principles Of Inheritance

Extensions Of Mendelism

The Chromosomal Basis Of Mendelism

Linkage,Crossing Over,And Chromosome Mapping In …

The Genetics Of Bacteria And Their Viruses

DNA And The Molecular Structure Of Chromosomes

Replication Of DNA And Chromosomes

Transcription And RNA Processing

Translation And The Genetic Code

Mutation,DNA Repair,And Recombination

The Techniques Of Molecular Genetics

Genomics

Applications Of Molecular Genetics

Transposable Genetics Elements

Regulation Of Gene Expression In Prokaryotes

Regulation Of Gene Expression In Eukaryotes

The Genetic Control Of Animal Development

The Genetic Basis Of Cancer

Inheritance Of Complex Traits

Population Genetics

Evolutionary Genetics

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