Question 1

What is the genetic consequence of a homozygous translocation?

Accepted Answer

A)  Inviable gamete formation (semisterility) 
B)  Gene duplications and deletions
C)  Formation of abnormal chromatids following crossing-over
D)  Abnormal pairing during meiosis
E)  An alteration in the linkage relationships of genesF) All of the above
G) B) and D)

Question 2

What are all the possible gametic genotypes produced by a trisomic individual that is genotype A/A+/B for the trisomic chromosome?

Accepted Answer

Three types of haploid gametes...

Question 3

During meiosis,what are the gametic consequences of a paracentric inversion with a single crossover event,compared to a pericentric inversion with a single crossover?

Accepted Answer

The paracentric inversion results in two...

Question 4

In humans,many types of cancers are associated with chromosomal mutations.

Accepted Answer

A) True 
 B)False  True

Question 5

Seedless bananas are produced from

Accepted Answer

A)  sterile tetraploid allopolyploid plants.
B)  sterile triploid autopolyploid plants.
C)  monoploid plants grown from unfertilized seeds.
D)  fertile diploid plants that are unfertilized.
E)  Both C and DF) C) and D)
G) B) and E)

Question 6

The causes of chromosomal deletion may include radiation,viral infection,chemical exposure,or transposable elements.

Accepted Answer

A) True 
 B)False  True

Question 7

A tetraploid cell contains four chromosomes.

Accepted Answer

A) True 
 B)False

Question 8

In familial Down syndrome resulting from Robertsonian translocation,

Accepted Answer

A)  the affected individual has three copies of the complete chromosome 21.
B)  the affected individual is missing a copy of chromosome 21.
C)  the affected individual has three copies of the long arm of chromosome 21,one of which is attached to part of chromosome 14.
D)  the affected individual has two copies of the long arm of chromosome 21,one of which is attached to part of chromosome 14.
E)  the affected individual has three copies of the long arm of chromosome 14,one of which is attached to chromosome 21.F) D) and E)
G) A) and D) C

Question 9

Inversion loops form to allow homologous chromosomes containing homozygous inversions to pair properly during meiosis.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following types of chromosomal mutation cannot revert to the wild-type state?

Accepted Answer

A)  Duplication
B)  Deletion
C)  Translocation
D)  Inversion
E)  Any of these may revert to wild-typeF) B) and C)
G) B) and D)

Question 11

How is hybrid sterility overcome in allopolyploid plants?

Accepted Answer

Typically,allopolyploids are produced wh...

Question 12

Which of the following types of analysis allows scientists to visualize an individual's chromosomal makeup?

Accepted Answer

A)  Karyotype analysis
B)  Pedigree analysis
C)  Genetic crosses
D)  Inheritance analysis
E)  Deletion mappingF) B) and C)
G) A) and B)

Question 13

Down syndrome (trisomy-21)is the only human autosomal trisomy in which the individuals may survive to adulthood.

Accepted Answer

A) True 
 B)False

Question 14

During meiosis in a reciprocal translocation heterozygote,what are the three ways that chromosomes may segregate at anaphase I,and what are the consequences for the resulting gametes?

Accepted Answer

In alternate segregation,alternate centr...

Question 15

A dicentric chromosome has two

Accepted Answer

A)  arms.
B)  centromeres.
C)  telomeres.
D)  mutations.
E)  centrosomes.F) A) and B)
G) A) and E)

Question 16

Which of the following is not used to help identify individual chromosomes in a karyotype?

Accepted Answer

A)  Centromere position
B)  Point mutations
C)  Chromosome size
D)  Banding pattern on staining
E)  Heterochromatin regionsF) B) and E)
G) None of the above

Question 17

Match between columns
                        Premises: Triploid
Trisomic
Aneuploid
Euploid
Polyploid

Accepted Answer

The Answer of A chromosome number that is not an is...

Question 18

How does a Philadelphia chromosome occur,and what condition does it cause?

Accepted Answer

Ninety percent of patients with the fata...

Question 19

What are the gametic consequences of a lack of cytokinesis following the first or second meiotic division?

Accepted Answer

The result will be a change in the numbe...

Question 20

Match between columns
                        Premises: Down syndrome
Edwards syndrome
Klinefelter syndrome
Turner syndrome
Patau syndrome

Accepted Answer

The Answer of Three copies of chromosome 18 and Three is...

Exam 16: Variations in Chromosome Structure and Number

What is the genetic consequence of a homozygous translocation?

Correct Answer
verified

What are all the possible gametic genotypes produced by a trisomic individual that is genotype A/A^+/B for the trisomic chromosome?

Correct Answer
verified
Three types of haploid gametes...
View Answer

During meiosis,what are the gametic consequences of a paracentric inversion with a single crossover event,compared to a pericentric inversion with a single crossover?

Correct Answer
verified
The paracentric inversion results in two...
View Answer

In humans,many types of cancers are associated with chromosomal mutations.

Correct Answer
verified
True

Seedless bananas are produced from

Correct Answer
verified

The causes of chromosomal deletion may include radiation,viral infection,chemical exposure,or transposable elements.

Correct Answer
verified
True

A tetraploid cell contains four chromosomes.

Correct Answer
verified

In familial Down syndrome resulting from Robertsonian translocation,

Correct Answer
verified
C

Inversion loops form to allow homologous chromosomes containing homozygous inversions to pair properly during meiosis.

Correct Answer
verified

Which of the following types of chromosomal mutation cannot revert to the wild-type state?

Correct Answer
verified

How is hybrid sterility overcome in allopolyploid plants?

Correct Answer
verified
Typically,allopolyploids are produced wh...
View Answer

Which of the following types of analysis allows scientists to visualize an individual's chromosomal makeup?

Correct Answer
verified

Down syndrome (trisomy-21)is the only human autosomal trisomy in which the individuals may survive to adulthood.

Correct Answer
verified

During meiosis in a reciprocal translocation heterozygote,what are the three ways that chromosomes may segregate at anaphase I,and what are the consequences for the resulting gametes?

Correct Answer
verified
In alternate segregation,alternate centr...
View Answer

A dicentric chromosome has two

Correct Answer
verified

Which of the following is not used to help identify individual chromosomes in a karyotype?

Correct Answer
verified

Please select the best match for each term.

How does a Philadelphia chromosome occur,and what condition does it cause?

Correct Answer
verified
Ninety percent of patients with the fata...
View Answer

What are the gametic consequences of a lack of cytokinesis following the first or second meiotic division?

Correct Answer
verified
The result will be a change in the numbe...
View Answer

Please select the best match for each term.

Exam 16: Variations in Chromosome Structure and Number

What is the genetic consequence of a homozygous translocation?

Correct AnswerverifiedShow Answer

What are all the possible gametic genotypes produced by a trisomic individual that is genotype A/A+/B for the trisomic chromosome?

Correct AnswerverifiedThree types of haploid gametes...View AnswerShow Answer

During meiosis,what are the gametic consequences of a paracentric inversion with a single crossover event,compared to a pericentric inversion with a single crossover?

Correct AnswerverifiedThe paracentric inversion results in two...View AnswerShow Answer

In humans,many types of cancers are associated with chromosomal mutations.

Correct AnswerverifiedTrue

Seedless bananas are produced from

Correct AnswerverifiedShow Answer

The causes of chromosomal deletion may include radiation,viral infection,chemical exposure,or transposable elements.

Correct AnswerverifiedTrue

A tetraploid cell contains four chromosomes.

Correct AnswerverifiedShow Answer

In familial Down syndrome resulting from Robertsonian translocation,

Correct AnswerverifiedC

Inversion loops form to allow homologous chromosomes containing homozygous inversions to pair properly during meiosis.

Correct AnswerverifiedShow Answer

Which of the following types of chromosomal mutation cannot revert to the wild-type state?

Correct AnswerverifiedShow Answer

How is hybrid sterility overcome in allopolyploid plants?

Correct AnswerverifiedTypically,allopolyploids are produced wh...View AnswerShow Answer

Which of the following types of analysis allows scientists to visualize an individual's chromosomal makeup?

Correct AnswerverifiedShow Answer

Down syndrome (trisomy-21)is the only human autosomal trisomy in which the individuals may survive to adulthood.

Correct AnswerverifiedShow Answer

During meiosis in a reciprocal translocation heterozygote,what are the three ways that chromosomes may segregate at anaphase I,and what are the consequences for the resulting gametes?

Correct AnswerverifiedIn alternate segregation,alternate centr...View AnswerShow Answer

A dicentric chromosome has two

Correct AnswerverifiedShow Answer

Which of the following is not used to help identify individual chromosomes in a karyotype?

Correct AnswerverifiedShow Answer

Please select the best match for each term.

How does a Philadelphia chromosome occur,and what condition does it cause?

Correct AnswerverifiedNinety percent of patients with the fata...View AnswerShow Answer

What are the gametic consequences of a lack of cytokinesis following the first or second meiotic division?

Correct AnswerverifiedThe result will be a change in the numbe...View AnswerShow Answer

Please select the best match for each term.

Correct Answer
verified

What are all the possible gametic genotypes produced by a trisomic individual that is genotype A/A^+/B for the trisomic chromosome?

Correct Answer
verified
Three types of haploid gametes...
View Answer

Correct Answer
verified
The paracentric inversion results in two...
View Answer

Correct Answer
verified
True

Correct Answer
verified

Correct Answer
verified
True

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Typically,allopolyploids are produced wh...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
In alternate segregation,alternate centr...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Ninety percent of patients with the fata...
View Answer

Correct Answer
verified
The result will be a change in the numbe...
View Answer