Question 1

Which of the following accurately describe anaphase I and anaphase II? Select all that apply.

Accepted Answer

A)  At the end of anaphase I,each chromosome is composed of two chromatids and at the end of anaphase II,sister chromatids have separated.
B)  Anaphase I occurs in a haploid cell while anaphase II occurs in a diploid cell.
C)  Homologous chromosomes separate during anaphase I and sister chromatids separate during anaphase II.
D)  Anaphase I occurs in both males and females but anaphase II only occurs in females.E) B) and C)
F) A) and C)

Question 2

Which statement applies only to plants?

Accepted Answer

A)  The haploid phase can be larger than the diploid phase.
B)  They use sexual reproduction to produce new offspring.
C)  They use meiosis in order to produce the gametes.
D)  They will have a haploid and diploid phase of the life cycle.E) A) and C)
F) B) and C)

Question 3

Study the figure depicting the process of spermatogenesis.Name the labeled cells and tell whether they are haploid or diploid.In what part of meiosis is the number of chromosomes reduced by half?

Accepted Answer

The number of chromosomes are ...

Question 4

If gametes had the same number of chromosomes as body cells,and an organism had 12 chromosomes in its body cells,how many chromosomes would it have after three generations? How does this illustrate the necessity of meiosis for gamete formation?

Accepted Answer

The number of chromosomes would double e...

Question 5

Interkinesis is different from interphase in which way?

Accepted Answer

A)  Interkinesis occurs after a cell finishes a nuclear division.
B)  Interkinesis is the stage that precedes a prophase stage.
C)  Interphase involves DNA replication and interkinesis does not.
D)  Interkinesis can be variable in length.E) None of the above
F) All of the above

Question 6

Characterize the following statements about changes in chromosome number and structure as True or False.
-The correct number of chromosomes in a species is known as aneuploidy.

Accepted Answer

A) True 
 B)False

Question 7

All of the following are true concerning Down syndrome EXCEPT

Accepted Answer

A)  it is caused by autosomal trisomy 21.
B)  in 23% of cases,the sperm contributes the extra chromosome.
C)  it is the most common trisomy in humans.
D)  chances of a woman having a child with Down syndrome decrease as she gets older.E) A) and B)
F) None of the above

Question 8

In meiosis,the reduction from 2n to n is accomplished by sister chromatids splitting apart and migrating to opposite daughter cells.

Accepted Answer

A) True 
 B)False

Question 9

If the diploid number of chromosomes for an organism is 52,what will the haploid number of chromosomes be?

Accepted Answer

A)  26
B)  48
C)  112
D)  24E) A) and B)
F) B) and C)

Question 10

The polar body is

Accepted Answer

A)  another name for an egg cell.
B)  a precursor cell that becomes an egg cell.
C)  a nonfunctional cell formed at the same time as an egg cell.
D)  the cell produced when fertilization occurs.E) C) and D)
F) A) and B)

Question 11

During which phase of mitosis and meiosis will the state of the chromosome be the same?

Accepted Answer

A)  anaphase II and anaphase
B)  prophase II and prophase
C)  metaphase I and metaphase
D)  telophase I and telophaseE) A) and B)
F) A) and C)

Question 12

The following picture depicts which of the following changes in chromosome structure?

Accepted Answer

A)  deletion
B)  duplication
C)  translocation
D)  aneuploidyE) All of the above
F) B) and D)

Question 13

Which of the following is/are true about sexual reproduction?

Accepted Answer

A)  Gametes are the only haploid phase of the human life cycle.
B)  The production of gametes is known as gametogenesis.
C)  A fertilized egg is known as a zygote.
D)  All of the choices are true.
E)  None of the choices are true.F) C) and D)
G) B) and C)

Question 14

During which stage of meiosis do the homologous chromosomes separate?

Accepted Answer

A)  prophase I
B)  anaphase I
C)  telophase I
D)  prophase II
E)  anaphase IIF) B) and E)
G) None of the above

Question 15

Study the diagram to answer the following questions.  A.What process is occurring in this diagram?
B.What structures,represented by (ABCD)and (abcd),are participating in this process?
C.How has this changed the structures?

Accepted Answer

A.Crossing-over is occurring.It is the e...

Question 16

Species X reproduces asexually by fission and species Y reproduces sexually.Consider that all other relevant characteristics are similar between these species.When the environment changes,then

Accepted Answer

A)  species X and Y will have an equal chance of surviving.
B)  species Y should have a better chance of surviving than species X.
C)  species X should have a better chance of surviving than species Y.
D)  neither species should have an advantage in surviving since organisms often become extinct when the environment changes.E) A) and D)
F) A) and B)

Question 17

Only one of the four daughter cells becomes a functional gamete in spermatogenesis.

Accepted Answer

A) True 
 B)False

Question 18

There is a species of desert lizard that is entirely female.It is nevertheless necessary for two females to court and for one to assume the posture of a male to stimulate the female to produce eggs.No fertilization can occur,and the eggs develop into female lizards.What is the probable evolutionary mechanism for this occurring?

Accepted Answer

A)  The species is probably going extinct.
B)  The desert is relatively uniform and there is little advantage to maintaining variation,but the animal has not been able to completely evolve away from its heritage of sexual reproduction.
C)  The mating behavior probably evolved accidentally.
D)  This is probably an asexual organism attempting to mimic sexual reproduction.E) A) and D)
F) B) and D)

Question 19

Why is crossing-over important?

Accepted Answer

A)  It provides extra genetic material for the daughter cells.
B)  It increases the likelihood that daughter cells contain different genetic material.
C)  It produces the proteins that are associated with DNA in chromosomes.
D)  It increases chromosome condensation.
E)  It separates the homologous chromosomes.F) C) and E)
G) A) and E)

Question 20

Meiosis accomplishes all of the following EXCEPT

Accepted Answer

A)  gamete production.
B)  reduction of chromosome number (from 2n to n) .
C)  providing genetic variation in sexually reproducing organisms.
D)  growth and repair.E) B) and C)
F) A) and D)

Exam 10: Meiosis and Sexual Reproduction

If the diploid number of chromosomes for an organism is 52,what will the haploid number of chromosomes be?

Correct Answer
verified

Which of the following accurately describe anaphase I and anaphase II? Select all that apply.

Correct Answer
verified

During which stage of meiosis do the homologous chromosomes separate?

Correct Answer
verified

Why is crossing-over important?

Correct Answer
verified

All of the following are true concerning Down syndrome EXCEPT

Correct Answer
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The following picture depicts which of the following changes in chromosome structure?

Correct Answer
verified

Correct Answer
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The polar body is

Correct Answer
verified

During which phase of mitosis and meiosis will the state of the chromosome be the same?

Correct Answer
verified

If gametes had the same number of chromosomes as body cells,and an organism had 12 chromosomes in its body cells,how many chromosomes would it have after three generations? How does this illustrate the necessity of meiosis for gamete formation?

Correct Answer
verified
The number of chromosomes would double e...
View Answer

Which of the following is/are true about sexual reproduction?

Correct Answer
verified

Meiosis accomplishes all of the following EXCEPT

Correct Answer
verified

Study the diagram to answer the following questions. A.What process is occurring in this diagram? B.What structures,represented by (ABCD)and (abcd),are participating in this process? C.How has this changed the structures?

Correct Answer
verified
A.Crossing-over is occurring.It is the e...
View Answer

Interkinesis is different from interphase in which way?

Correct Answer
verified

Only one of the four daughter cells becomes a functional gamete in spermatogenesis.

Correct Answer
verified

Study the figure depicting the process of spermatogenesis.Name the labeled cells and tell whether they are haploid or diploid.In what part of meiosis is the number of chromosomes reduced by half?

Correct Answer
verified
The number of chromosomes are ...
View Answer

In meiosis,the reduction from 2n to n is accomplished by sister chromatids splitting apart and migrating to opposite daughter cells.

Correct Answer
verified

Species X reproduces asexually by fission and species Y reproduces sexually.Consider that all other relevant characteristics are similar between these species.When the environment changes,then

Correct Answer
verified

Which statement applies only to plants?

Correct Answer
verified

Characterize the following statements about changes in chromosome number and structure as True or False. -The correct number of chromosomes in a species is known as aneuploidy.

Correct Answer
verified

Exam 10: Meiosis and Sexual Reproduction

If the diploid number of chromosomes for an organism is 52,what will the haploid number of chromosomes be?

Correct AnswerverifiedShow Answer

Which of the following accurately describe anaphase I and anaphase II? Select all that apply.

Correct AnswerverifiedShow Answer

During which stage of meiosis do the homologous chromosomes separate?

Correct AnswerverifiedShow Answer

Why is crossing-over important?

Correct AnswerverifiedShow Answer

All of the following are true concerning Down syndrome EXCEPT

Correct AnswerverifiedShow Answer

The following picture depicts which of the following changes in chromosome structure?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The polar body is

Correct AnswerverifiedShow Answer

During which phase of mitosis and meiosis will the state of the chromosome be the same?

Correct AnswerverifiedShow Answer

If gametes had the same number of chromosomes as body cells,and an organism had 12 chromosomes in its body cells,how many chromosomes would it have after three generations? How does this illustrate the necessity of meiosis for gamete formation?

Correct AnswerverifiedThe number of chromosomes would double e...View AnswerShow Answer

Which of the following is/are true about sexual reproduction?

Correct AnswerverifiedShow Answer

Meiosis accomplishes all of the following EXCEPT

Correct AnswerverifiedShow Answer

Study the diagram to answer the following questions. A.What process is occurring in this diagram? B.What structures,represented by (ABCD)and (abcd),are participating in this process? C.How has this changed the structures?

Correct AnswerverifiedA.Crossing-over is occurring.It is the e...View AnswerShow Answer

Interkinesis is different from interphase in which way?

Correct AnswerverifiedShow Answer

Only one of the four daughter cells becomes a functional gamete in spermatogenesis.

Correct AnswerverifiedShow Answer

Study the figure depicting the process of spermatogenesis.Name the labeled cells and tell whether they are haploid or diploid.In what part of meiosis is the number of chromosomes reduced by half?

Correct AnswerverifiedThe number of chromosomes are ...View AnswerShow Answer

In meiosis,the reduction from 2n to n is accomplished by sister chromatids splitting apart and migrating to opposite daughter cells.

Correct AnswerverifiedShow Answer

Species X reproduces asexually by fission and species Y reproduces sexually.Consider that all other relevant characteristics are similar between these species.When the environment changes,then

Correct AnswerverifiedShow Answer

Which statement applies only to plants?

Correct AnswerverifiedShow Answer

Characterize the following statements about changes in chromosome number and structure as True or False. -The correct number of chromosomes in a species is known as aneuploidy.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
The number of chromosomes would double e...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A.Crossing-over is occurring.It is the e...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The number of chromosomes are ...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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