Question 1

The most common survival trisomy is trisomy 13.

Accepted Answer

A) True 
 B)False

Question 2

Klinefelter syndrome patients who are mosaics have some cells with 46, XY and others with ____________________.

Accepted Answer

The answer of Klinefelter syndrome patients who are mosaics have...

Question 3

People with the chromosome constitution ____________________ were once considered more genetically predisposed to committing violent crime than those with a normal chromosome constitution.

Accepted Answer

The answer of People with the chromosome constitution ____________________ were...

Question 4

Most triploid zygotes arise from

Accepted Answer

A)   fertilization of a diploid egg by a normal haploid sperm.
B)   fertilization of a normal haploid egg by a diploid sperm.
C)   fertilization of a normal haploid egg by two sperm.
D)   nondisjunction during the zygote's first mitotic division.
E)   fusion of the zygote with an unfertilized egg.

Question 5

Which of the following is not information derived from karyotypes?

Accepted Answer

A)   The number of chromosomes in a genome.
B)   The number and type of sex chromosomes.
C)   The presence or absence of individual chromosomes.
D)   Structural abnormalities.
E)   The pattern of inheritance: recessive, dominant, etc.

Question 6

Distinguish between:
a. Trisomy 13 and trisomy 18
b. Triploidy and tetraploidy
c. Angelman syndrome and Prader-Willi syndrome

Accepted Answer

a. Trisomy 13 and trisomy 18:
Trisomy 13...

Question 7

Studies on aneuploidies of the sex chromosomes reveal that

Accepted Answer

A)   the X chromosome is not necessary for survival.
B)   the Y chromosome is not necessary for survival.
C)   two copies of the X chromosome are necessary for survival.
D)   two copies of the Y chromosome are fatal.
E)   none of these is true.

Question 8

Which of the following is an enzyme used in G-banding?

Accepted Answer

A)   Quinacrine
B)   Giemsa
C)   Trypsin
D)   Catalase
E)   Peroxidase

Question 9

What chromosomal mutation occurs in each of the following: Patau syndrome, Klinefelter syndrome, Turner syndrome, and Angelman syndrome?

Accepted Answer

Patau syndrome, Klinefelter syndrome, Tu...

Question 10

Show how the frequencies of many chromosome abnormalities are different in newborns than they are in fetuses.

Accepted Answer

The frequencies of chromosome abnormalit...

Question 11

Turner syndrome is associated with severe mental retardation.

Accepted Answer

A) True 
 B)False

Question 12

Due to a chromosome deletion, Timothy is very retarded, both physically and mentally. He also has a severe abnormality of his voice-box so that his cry is abnormal. Give the karyotypic designation and the name of the syndrome that he most likely has. ____________________

Accepted Answer

46, XY, (d...

Question 13

The reason for the spontaneous abortion of almost all 45, X fetuses is unknown.

Accepted Answer

A) True 
 B)False

Question 14

The region at the end of a chromosome is termed the _______.

Accepted Answer

A)   centromere
B)   telomere
C)   satellite
D)   P arm
E)   Q arm

Question 15

If a mother already has a child with chromosomal abnormalities, the risk of having another child with chromosomal abnormalities is 10 percent.

Accepted Answer

A) True 
 B)False

Question 16

The letters G, Q, R, and C are used to describe bands that appear on chromosomes. The letters refer to

Accepted Answer

A)   the position of the bands.
B)   the staining procedure used to reveal the bands.
C)   the size of the bands.
D)   the types of genes found within the bands.
E)   the relative importance of the bands in karyotyping.

Question 17

How does polyploidy differ from aneuploidy?

Accepted Answer

A)   Polyploidy involves diploid chromosome sets, while aneuploidy involves haploid sets.
B)   Polyploidy involves changes in entire chromosome sets; aneuploidy involves less than a diploid set of chromosomes.
C)   Polyploidy involves monosomy; aneuploidy involves trisomy.
D)   Polyploidy is produced by translocations; aneuploidy by nondisjunction.
E)   None of these is a difference between polyploidy and aneuploidy.

Question 18

The short arm of a submetacentric chromosome is symbolized as the ____________________ arm.

Accepted Answer

The answer of The short arm of a submetacentric chromosome...

Question 19

Characterize the frequency of changes in chromosome number in humans.

Accepted Answer

A)   Close to half of all conceptions are aneuploid.
B)   They are a major cause of reproductive failure.
C)   The frequency is significantly higher than it is in closely-related animals.
D)   All of these.
E)   None of these.

Question 20

Describe the chromosomal constitution of the four cells of meiosis if a nondisjunction event occurred in Anaphase I.

Accepted Answer

In the event of a nondisjunction event o...

Exam 6: Cytogenetics: Karyotypes and Chromosome Aberrations

Most triploid zygotes arise from

Correct AnswerverifiedShow Answer

The letters G, Q, R, and C are used to describe bands that appear on chromosomes. The letters refer to

Correct AnswerverifiedShow Answer

Studies on aneuploidies of the sex chromosomes reveal that

Correct AnswerverifiedShow Answer

Which of the following is not information derived from karyotypes?

Correct AnswerverifiedShow Answer

The short arm of a submetacentric chromosome is symbolized as the ____________________ arm.

Correct AnswerverifiedShow Answer

What chromosomal mutation occurs in each of the following: Patau syndrome, Klinefelter syndrome, Turner syndrome, and Angelman syndrome?

Correct AnswerAnswered by ExamLex AIPatau syndrome, Klinefelter syndrome, Tu...View AnswerShow Answer

The most common survival trisomy is trisomy 13.

Correct AnswerverifiedShow Answer

If a mother already has a child with chromosomal abnormalities, the risk of having another child with chromosomal abnormalities is 10 percent.

Correct AnswerverifiedShow Answer

Which of the following is an enzyme used in G-banding?

Correct AnswerverifiedShow Answer

Turner syndrome is associated with severe mental retardation.

Correct AnswerverifiedShow Answer

Show how the frequencies of many chromosome abnormalities are different in newborns than they are in fetuses.

Correct AnswerAnswered by ExamLex AIThe frequencies of chromosome abnormalit...View AnswerShow Answer

People with the chromosome constitution ____________________ were once considered more genetically predisposed to committing violent crime than those with a normal chromosome constitution.

Correct AnswerverifiedShow Answer

Describe the chromosomal constitution of the four cells of meiosis if a nondisjunction event occurred in Anaphase I.

Correct AnswerAnswered by ExamLex AIIn the event of a nondisjunction event o...View AnswerShow Answer

The reason for the spontaneous abortion of almost all 45, X fetuses is unknown.

Correct AnswerverifiedShow Answer

Distinguish between: a. Trisomy 13 and trisomy 18 b. Triploidy and tetraploidy c. Angelman syndrome and Prader-Willi syndrome

Correct AnswerAnswered by ExamLex AIa. Trisomy 13 and trisomy 18:Trisomy 13...View AnswerShow Answer

Characterize the frequency of changes in chromosome number in humans.

Correct AnswerverifiedShow Answer

Klinefelter syndrome patients who are mosaics have some cells with 46, XY and others with ____________________.

Correct AnswerverifiedShow Answer

The region at the end of a chromosome is termed the _______.

Correct AnswerverifiedShow Answer

How does polyploidy differ from aneuploidy?

Correct AnswerverifiedShow Answer

Due to a chromosome deletion, Timothy is very retarded, both physically and mentally. He also has a severe abnormality of his voice-box so that his cry is abnormal. Give the karyotypic designation and the name of the syndrome that he most likely has. ____________________

Correct Answerverified46, XY, (d...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
Patau syndrome, Klinefelter syndrome, Tu...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
The frequencies of chromosome abnormalit...
View Answer

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
In the event of a nondisjunction event o...
View Answer

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
a. Trisomy 13 and trisomy 18:
Trisomy 13...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
46, XY, (d...
View Answer