Question 1

The centromere divides during

Accepted Answer

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

Question 2

____ does not contribute to genetic variety.

Accepted Answer

A)   Independent assortment
B)   Cytokinesis
C)   Sexual reproduction
D)   Crossing-overE) C) and D)
F) All of the above

Question 3

The time it takes for cells to divide

Accepted Answer

A)   varies, but it takes sophisticated equipment to measure this small difference.
B)   depends on the health and environment of the cell.
C)   does not vary at all, but is controlled by an internal clock.
D)   varies widely and unpredictably in cells of the same local area of the same organism during any specific time period.E) B) and C)
F) A) and C)

Question 4

Cells spend most of their life

Accepted Answer

A)   in the G0 phase.
B)   dividing.
C)   in metaphase.
D)   undergoing differentiation.E) A) and B)
F) A) and C)

Question 5

____ is not part of interphase.

Accepted Answer

A)   Gap 1
B)   Gap 2
C)   Cytokinesis
D)   DNA synthesisE) A) and B)
F) A) and C)

Question 6

Chromosomes first become visible during

Accepted Answer

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

Question 7

In which of the following ways does an anaphase I cell differ from an anaphase II cell?

Accepted Answer

A)   Anaphase I cells have fewer chromosomes than Anaphase II cells.
B)   Anaphase I cells lack a nuclear membrane; anaphase II cells have a nuclear membrane.
C)   Anaphase I cells are capable of fertilization and anaphase II cells are not.
D)   Anaphase I cells have chromosomes separating; anaphase II cells have chromatids separating.E) None of the above
F) All of the above

Question 8

Independent assortment refers to the fact that

Accepted Answer

A)   a cell will divide and produce various offspring regardless of whether any other cell is dividing.
B)   mitosis normally produces cells that are like each other and like the parent cell.
C)   the daughter cell that receives the maternal 1 chromosome will not necessarily receive the maternal 2.
D)   a crossover between two chromosomes will produce offspring unlike either parent.E) A) and B)
F) C) and D)

Question 9

Centromeres are

Accepted Answer

A)   composed of microtubules.
B)   two identical sides of a metaphase chromosome.
C)   regions that attach chromosomes.
D)   the structures that contain genetic material.E) B) and C)
F) A) and C)

Question 10

Which of the following is false regarding nondisjunction?

Accepted Answer

A)   Nondisjunction results in sex cells having too few or too many chromosomes.
B)   The frequency of nondisjunction increases in women over the age of 37.
C)   Nondisjunction is a cause of Down syndrome.
D)   A cell with one too few chromosomes is trisomic.E) C) and D)
F) None of the above

Question 11

The exchange of chromosome parts may occur during

Accepted Answer

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

Question 12

During prophase of mitosis, the

Accepted Answer

A)   nucleus is preparing for the beginning stage of mitosis that will follow.
B)   chromosomes are so loosely coiled and stretched out that they are not yet visible.
C)   nucleoli and nuclear membrane disappear.
D)   zygote is formed.E) C) and D)
F) A) and B)

Question 13

Nondisjunction in humans can result in

Accepted Answer

A)   22 pairs of autosomes, an X chromosome and a Y chromosome.
B)   22 pairs of autosomes, and two X chromosomes.
C)   47 chromosomes.
D)   46 chromosomes.E) All of the above
F) A) and C)

Question 14

When homologous chromosomes are at the equator of the cell, it is in

Accepted Answer

A)   telophase.
B)   metaphase I.
C)   metaphase II.
D)   Any of these stages.E) A) and B)
F) A) and C)

Question 15

Chromosomes move toward the poles during

Accepted Answer

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

Question 16

If a body cell has 8 chromosomes (e.g., fruit fly) , how many pairs will form during Prophase II?

Accepted Answer

A)   4
B)   8
C)   2
D)   None of these is correct.E) B) and C)
F) A) and B)

Question 17

A zygote

Accepted Answer

A)   is haploid.
B)   contains all of the genes from each parent.
C)   is formed by meiosis.
D)   is genetically different from either parent.E) None of the above
F) All of the above

Question 18

Segregation refers to the separation of

Accepted Answer

A)   linked genes from each other.
B)   alleles.
C)   dominant genes from the rest of the chromosome.
D)   assorted structures in the cell.E) C) and D)
F) A) and D)

Question 19

In what mitotic stage does the cytoplasm divide?

Accepted Answer

A)   prophase
B)   metaphase
C)   anaphase
D)   telophaseE) A) and B)
F) C) and D)

Question 20

During which of the following stages of meiosis does the cell contain the LEAST amount of DNA?

Accepted Answer

A)   telophase II
B)   prophase II
C)   anaphase I
D)   prophase IE) A) and D)
F) None of the above

Exam 9: Cell Division: Proliferation and Reproduction

Cells spend most of their life

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The centromere divides during

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____ is not part of interphase.

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If a body cell has 8 chromosomes (e.g., fruit fly) , how many pairs will form during Prophase II?

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In which of the following ways does an anaphase I cell differ from an anaphase II cell?

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The exchange of chromosome parts may occur during

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In what mitotic stage does the cytoplasm divide?

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During which of the following stages of meiosis does the cell contain the LEAST amount of DNA?

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Chromosomes move toward the poles during

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During prophase of mitosis, the

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When homologous chromosomes are at the equator of the cell, it is in

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Chromosomes first become visible during

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The time it takes for cells to divide

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A zygote

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Independent assortment refers to the fact that

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Which of the following is false regarding nondisjunction?

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Nondisjunction in humans can result in

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Segregation refers to the separation of

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Centromeres are

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____ does not contribute to genetic variety.

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