Question 1

You are looking at a cell under the microscope,and see what appears to be several "X" structures being pulled to each side of the cell.What stage of meiosis are you looking at?

Accepted Answer

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

Question 2

Without considering the variation provided by crossing-over,how much will two siblings from one set of parents vary from each other?

Accepted Answer

A)   All siblings from the same parents are identical to each other and demonstrate traits that are exactly halfway between their parents' traits.
B)   Siblings receive 100% of one parent's genes or the other parent's genes so they will either be identical if they receive the same parent's genes, or nothing alike if they receive different parent's genes.
C)   Siblings inherit essentially 50% of their genes from each parent, but two sibling offspring may share with each other from zero to 23 chromosomes in common from each parent and therefore vary widely from each other.
D)   Siblings inherit copies of the same 23 pair of chromosomes from each parent and only crossing-over provides any differences between siblings.
E)   There is one chance in 23 of getting identical sets of chromosomes from one parent, times two because there are two parents; therefore two siblings out of 46 will be identical except for the extent of crossing-over.F) C) and E)
G) A) and B)

Question 3

Which of the following is not true concerning the checkpoints in the cell cycle?

Accepted Answer

A)   Mitosis stops if chromosomes are not properly aligned.
B)   Mitosis will not occur if DNA is damaged or not replicated.
C)   If DNA is damaged, apoptosis may occur.
D)   The first checkpoint is located in the S phase of interphase.
E)   Cyclins must be present at certain stages to advance to the next stage.F) A) and D)
G) A) and E)

Question 4

Which sequence of stages in mitosis is correct?

Accepted Answer

A)   prophase, metaphase, interphase, telophase
B)   metaphase, anaphase, prophase, telophase
C)   anaphase, interphase, telophase, prophase
D)   prophase, metaphase, anaphase, telophase
E)   interphase, metaphase, prophase, anaphaseF) A) and E)
G) A) and D)

Question 5

During which stage of the cell cycle do the chromosomes duplicate?

Accepted Answer

A)   prophase
B)   anaphase
C)   interphase
D)   telophase
E)   mitosisF) A) and D)
G) B) and E)

Question 6

The second meiotic division is essentially a mitotic division except for the fact that the cells produced are

Accepted Answer

A)   haploid.
B)   diploid.
C)   polyploid.
D)   autosomal.
E)   somatic.F) A) and E)
G) All of the above

Question 7

You are looking at chromosome 1 in a human being.Assuming there is no crossing over,what is the source of all the genes on this chromosome?

Accepted Answer

A)   mother
B)   father
C)   either the mother or father
D)   a combination of both mother and father
E)   it is impossible to tell given this informationF) B) and D)
G) A) and D)

Question 8

The nuclear membrane reappears in mitosis during

Accepted Answer

A)   interphase.
B)   prophase.
C)   metaphase.
D)   anaphase.
E)   telophase.F) A) and B)
G) A) and C) E

Question 9

During mitosis,separation of the sister chromatids ensures that each daughter cell will receive two copies of each type of chromosome.

Accepted Answer

A) True 
 B)False

Question 10

Meiosis results in a change in chromosome number indicated by

Accepted Answer

A)   2n to 2n.
B)   2n to n.
C)   n to 2n.
D)   n to n.
E)   2n to 2n in diploid organisms, n to n in haploid.F) None of the above
G) B) and C)

Question 11

Replication of the DNA for meiosis occurs between telophase I and prophase II.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is not true of the chromosomes in a cell undergoing mitosis?

Accepted Answer

A)   They are highly compacted.
B)   They are available for RNA synthesis.
C)   They have histones bound to them.
D)   They are found within the cell nucleus.
E)   They are present in the diploid number.F) C) and E)
G) D) and E)

Question 13

During what stage of meiosis do sister chromatids separate from each other?

Accepted Answer

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

Question 14

An organism has 8 pairs of chromosomes.If sperm and egg did not undergo meiosis,how many chromosomes would be present in a cell that resulted from the fusion of a sperm and egg?

Accepted Answer

A)   8
B)   16
C)   24
D)   32
E)   64F) A) and E)
G) A) and C) D

Question 15

Meiosis differs from mitosis in that

Accepted Answer

A)   it occurs only in the reproductive tissues that produce gametes.
B)   the chromosomes are duplicated twice.
C)   the resulting cells are polyploid.
D)   the chromosome pairs do not separate.
E)   the daughter cells are all genetically identical to the mother cell and each other.F) A) and B)
G) A) and C)

Question 16

Which of the following events would be controlled by an external signal?

Accepted Answer

A)   Cell division.
B)   Prophase proceeds into metaphase.
C)   The chromosomes align at the equatorial plane before the cell begins anaphase.
D)   All of the DNA is copied before the cell enters into the G2 phase.
E)   All of these are controlled by an external signal.F) D) and E)
G) All of the above

Question 17

Eukaryotic chromosomes are composed of

Accepted Answer

A)   DNA.
B)   protein.
C)   histones.
D)   chromatin.
E)   RNA.F) B) and C)
G) A) and B)

Question 18

During which phases of the cell cycle do the chromosomes look like "X"s?

Accepted Answer

A)   prophase, anaphase
B)   anaphase, metaphase
C)   metaphase, telophase
D)   prophase, metaphase
E)   anaphase, telophaseF) C) and D)
G) A) and B)

Question 19

Microtubules found in spindle fibers are capable of assembling and disassembling.

Accepted Answer

A) True 
 B)False

Question 20

When does apoptosis occur?

Accepted Answer

A)   during development
B)   during interphase
C)   during mitosis
D)   during meiosis
E)   during injury repairF) None of the above
G) A) and B)

Exam 5: Cell Division

You are looking at a cell under the microscope,and see what appears to be several "X" structures being pulled to each side of the cell.What stage of meiosis are you looking at?

Correct AnswerverifiedShow Answer

Without considering the variation provided by crossing-over,how much will two siblings from one set of parents vary from each other?

Correct AnswerverifiedShow Answer

Which of the following is not true concerning the checkpoints in the cell cycle?

Correct AnswerverifiedShow Answer

Which sequence of stages in mitosis is correct?

Correct AnswerverifiedShow Answer

During which stage of the cell cycle do the chromosomes duplicate?

Correct AnswerverifiedShow Answer

The second meiotic division is essentially a mitotic division except for the fact that the cells produced are

Correct AnswerverifiedShow Answer

You are looking at chromosome 1 in a human being.Assuming there is no crossing over,what is the source of all the genes on this chromosome?

Correct AnswerverifiedShow Answer

The nuclear membrane reappears in mitosis during

Correct AnswerverifiedE

During mitosis,separation of the sister chromatids ensures that each daughter cell will receive two copies of each type of chromosome.

Correct AnswerverifiedShow Answer

Meiosis results in a change in chromosome number indicated by

Correct AnswerverifiedShow Answer

Replication of the DNA for meiosis occurs between telophase I and prophase II.

Correct AnswerverifiedShow Answer

Which of the following is not true of the chromosomes in a cell undergoing mitosis?

Correct AnswerverifiedShow Answer

During what stage of meiosis do sister chromatids separate from each other?

Correct AnswerverifiedC

An organism has 8 pairs of chromosomes.If sperm and egg did not undergo meiosis,how many chromosomes would be present in a cell that resulted from the fusion of a sperm and egg?

Correct AnswerverifiedD

Meiosis differs from mitosis in that

Correct AnswerverifiedShow Answer

Which of the following events would be controlled by an external signal?

Correct AnswerverifiedShow Answer

Eukaryotic chromosomes are composed of

Correct AnswerverifiedShow Answer

During which phases of the cell cycle do the chromosomes look like "X"s?

Correct AnswerverifiedShow Answer

Microtubules found in spindle fibers are capable of assembling and disassembling.

Correct AnswerverifiedShow Answer

When does apoptosis occur?

Correct AnswerverifiedShow Answer

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E

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C

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D

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