Question 1

Which of the following steps would NOT lead to variation of genetic material?

Accepted Answer

A)   crossing over of homologous chromosomes
B)   crossing over of sister chromatids
C)   the random alignment of the chromosomes during metaphase I
D)   the combination of sperm and egg genesE) All of the above
F) B) and C)

Question 2

Sex chromosome aneuploids are better tolerated and have a better chance of producing survivors.

Accepted Answer

A) True 
 B)False

Question 3

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) C) and D)

Question 4

To what does the term chiasma refer?

Accepted Answer

A)   the process of fertilization
B)   the life cycle of a fungus
C)   the process of crossing-over
D)   a structure that holds together homologues during crossing-over
E)   the period between meiosis I and meiosis IIF) C) and D)
G) B) and D)

Question 5

If a cell contains 12 chromosomes at the end of meiosis I, how many chromosomes will the daughter cells contain at the end of meiosis II?

Accepted Answer

A)   3
B)   6
C)   12
D)   24E) B) and D)
F) C) and D)

Question 6

Oogenesis always involves an equal division of cell contents in the formation of an egg and polar bodies.

Accepted Answer

A) True 
 B)False

Question 7

Identify which event will occur during Prophase I of meiosis but does not occur during prophase of mitosis.

Accepted Answer

A)   bivalents will form
B)   nuclear envelope will dissolve
C)   centrioles will form in animal cells
D)   chromatin will condense into chromosomesE) B) and C)
F) A) and C)

Question 8

Primary nondisjunction occurs during meiosis II when the sister chromatids fail to separate and both daughter chromosomes go in the same gamete.

Accepted Answer

A) True 
 B)False

Question 9

Another name for a tetrad is a/an

Accepted Answer

A)   homologue.
B)   bivalent.
C)   öocyte.
D)   gamete.
E)   polar body.F) A) and E)
G) 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 rudiment formed at the same time as an egg cell.
D)   the cell produced when fertilization occurs.E) None of the above
F) All of the above

Question 11

The overall function of meiosis includes 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 of the overall individual.E) A) and B)
F) None of the above

Question 12

Jacobs Syndrome, XYY, results from nondisjunction during spermatogenesis.

Accepted Answer

A) True 
 B)False

Question 13

Study the figure to answer the following questions.

A) Is this cell going through mitosis or meiosis?
B) Explain your answer.
C) Identify the stage.

Accepted Answer

A. THE CELL IS IN THE METAPHASE I OF MEI...

Question 14

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?
A -
B -
C -
D -
E -
F -
G -
H -  
The number of chromosomes are reduced by half in Meiosis I.

Accepted Answer

A - primary spermatocytes
B - ...

Question 15

At which stage of meiosis is each chromosome composed of a single chromatid?

Accepted Answer

A)   prophase I
B)   metaphase II
C)   anaphase II
D)   prophase II
E)   metaphase IF) A) and B)
G) D) and E)

Question 16

Some plants are tetraploid (4n). How might such a plant arise?

Accepted Answer

Tetraploidy could result from a 2n zygot...

Question 17

A lattice holds the members of a bivalent together in such a way that the RNA of the non-sister chromatids is aligned.

Accepted Answer

A) True 
 B)False

Question 18

Which does NOT occur in meiosis?

Accepted Answer

A)   two daughter cells at completion
B)   four daughter cells at completion
C)   two nuclear divisions
D)   formation of bivalentsE) C) and D)
F) A) and C)

Question 19

Extra copies of sex chromosomes are more easily tolerated in humans than extra copies of autosomes.

Accepted Answer

A) True 
 B)False

Question 20

Study the diagram below. This is one cell with three homologous pairs of chromosomes pictured in eight different patterns.

Accepted Answer

A. This diagram illustrates the possible...

Exam 10: Meiosis and Sexual Reproduction

Extra copies of sex chromosomes are more easily tolerated in humans than extra copies of autosomes.

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? A - B - C - D - E - F - G - H - The number of chromosomes are reduced by half in Meiosis I.

Correct AnswerverifiedA - primary spermatocytesB - ...View AnswerShow Answer

Which does NOT occur in meiosis?

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Jacobs Syndrome, XYY, results from nondisjunction during spermatogenesis.

Correct AnswerverifiedShow Answer

Which of the following steps would NOT lead to variation of genetic material?

Correct AnswerverifiedShow Answer

To what does the term chiasma refer?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

If a cell contains 12 chromosomes at the end of meiosis I, how many chromosomes will the daughter cells contain at the end of meiosis II?

Correct AnswerverifiedShow Answer

Sex chromosome aneuploids are better tolerated and have a better chance of producing survivors.

Correct AnswerverifiedShow Answer

Identify which event will occur during Prophase I of meiosis but does not occur during prophase of mitosis.

Correct AnswerverifiedShow Answer

Study the diagram below. This is one cell with three homologous pairs of chromosomes pictured in eight different patterns.

Correct AnswerverifiedA. This diagram illustrates the possible...View AnswerShow Answer

At which stage of meiosis is each chromosome composed of a single chromatid?

Correct AnswerverifiedShow Answer

Primary nondisjunction occurs during meiosis II when the sister chromatids fail to separate and both daughter chromosomes go in the same gamete.

Correct AnswerverifiedShow Answer

Another name for a tetrad is a/an

Correct AnswerverifiedShow Answer

The overall function of meiosis includes all of the following EXCEPT

Correct AnswerverifiedShow Answer

Some plants are tetraploid (4n). How might such a plant arise?

Correct AnswerverifiedTetraploidy could result from a 2n zygot...View AnswerShow Answer

A lattice holds the members of a bivalent together in such a way that the RNA of the non-sister chromatids is aligned.

Correct AnswerverifiedShow Answer

The polar body is

Correct AnswerverifiedShow Answer

Study the figure to answer the following questions. A) Is this cell going through mitosis or meiosis? B) Explain your answer. C) Identify the stage.

Correct AnswerverifiedA. THE CELL IS IN THE METAPHASE I OF MEI...View AnswerShow Answer

Oogenesis always involves an equal division of cell contents in the formation of an egg and polar bodies.

Correct AnswerverifiedShow Answer

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A - primary spermatocytes
B - ...
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A. This diagram illustrates the possible...
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Tetraploidy could result from a 2n zygot...
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Correct Answer
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A. THE CELL IS IN THE METAPHASE I OF MEI...
View Answer

Correct Answer
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