Question 1

Chromosomes decondense into chromatin at which point in the cell cycle? ​

Accepted Answer

Chromosomes decondense into chromatin at the end of telophase, which is the final stage of cell division (mitosis or meiosis), leading back to the interphase state where the cell resumes its normal functions and prepares for potential future divisions.

Question 2

Cytokinesis typically begins during which stage of mitosis? ​

Accepted Answer

Cytokinesis typically begins in late anaphase or early telophase, but specifically, it begins after the completion of mitosis during telophase. Therefore the best choice is E - telophase.

Question 3

Embryonic development begins with a single egg fertilized by a single sperm, forming a zygote which then divides by mitosis. How many cells are present in the embryo at the conclusion of four mitotic divisions? ​

Accepted Answer

Each mitotic division results in the doubling of the number of cells, so after one division, there are 2 cells, after two divisions there are 4 cells, after three divisions there are 8 cells, and after four divisions there are 16 cells. Therefore, the correct answer is D) 16.

Question 4

During which phase(s)of mitosis are chromosomes composed of two sister chromatids? ​

Accepted Answer

During prophase, the sister chromatids become visible and start to condense. During prometaphase, the nuclear envelope breaks down completely and sister chromatids attach to the spindle fibers. During metaphase, the sister chromatids align at the center of the cell.

Question 5

Answer the following questions using the accompanying figure.
Figure 10.1
Identify the stage of mitosis shown in panel E. ​

Accepted Answer

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Question 6

Karyotype analyses are performed on cells in ____ of mitosis.

Accepted Answer

Karyotype analyzes the number, size, and shape of chromosomes. This can only be achieved during metaphase of mitosis, when chromosomes are fully condensed and aligned on the metaphase plate, making them easier to observe and count. Prophase, prometaphase, anaphase, and telophase do not have fully condensed chromosomes aligned on the metaphase plate, making them unsuitable for karyotyping.

Question 7

Which statement best describes the difference between cell division in plant and animal cells? ​

Accepted Answer

Cytokinesis, the process of cytoplasm division, differs between plant and animal cells. In animal cells, a cleavage furrow forms to divide the cell, whereas plant cells form a cell plate that eventually becomes the cell wall, separating the two daughter cells.

Question 8

Answer the following questions using the accompanying figure.
Figure 10.1
Identify the stage of mitosis shown in panel D. ​

Accepted Answer

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Question 9

When plants are produced by cloning, which process is most directly involved?

Accepted Answer

Cloning involves producing new individuals that are genetically identical to the parent through mitotic cell division.

Question 10

Which sequence of the cell cycle is correct? ​

Accepted Answer

The correct sequence of the cell cycle is interphase, followed by mitosis (prophase, prometaphase, metaphase, anaphase, and telophase), and then cytokinesis. Option D correctly lists interphase as the first phase, followed by the mitotic phases in the correct order, and ending with telophase.

Question 11

Answer the following questions using the accompanying figure.
Figure 10.1
Identify the stage of mitosis shown in panel A.

Accepted Answer

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Question 12

Certain human cell types, such as skeletal muscle cells, have several nuclei per cell. Based on your understanding of mitosis, how could this happen? ​

Accepted Answer

Cells like skeletal muscle cells undergo repeated rounds of mitosis without undergoing cytokinesis, leading to multiple nuclei within a single cell.

Question 13

Colchicine, a chemical extracted from the autumn crocus (C olchicum autumnale ), inhibits the formation of microtubules. Mitotic cells exposed to colchicine will therefore be arrested at ____. ​

Accepted Answer

Colchicine inhibits the formation of microtubules, which are necessary for the organization and movement of chromosomes during mitosis. Therefore, cells exposed to colchicine will be arrested at metaphase, when the chromosomes are aligned at the equator of the cell and waiting for the microtubules to attach to the kinetochores and separate the chromosomes to opposite poles of the cell.

Question 14

Organisms that reproduce asexually usually do so through the process of ____. ​

Accepted Answer

Asexual reproduction involves the production of genetically identical offspring from a single parent. This is typically achieved through mitosis, which creates two identical daughter cells from a single parent cell. Meiosis and gametogenesis involve the production of genetically diverse offspring through the reshuffling of genetic material from two parents, while spore formation typically involves the production of haploid cells that can develop into new organisms under favorable conditions. Fertilization involves the fusion of gametes from two parents to produce a genetically diverse offspring.

Question 15

Answer the following questions using the accompanying figure.
Figure 10.1
Identify the stage of mitosis shown in panel C.

Accepted Answer

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Question 16

Answer the following questions using the accompanying figure.
Figure 10.1
Identify the stage of mitosis shown in panel B.

Accepted Answer

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Question 17

During ____, microtubules disassemble, pulling the chromatids to the ends of the spindle. ​

Accepted Answer

During anaphase, microtubules disassemble and pull the chromatids towards the spindle poles. This is the phase of mitosis where the sister chromatids separate and move towards opposite ends of the cell.

Question 18

The mitotic spindle is primarily composed of ____. ​

Accepted Answer

The mitotic spindle is primarily composed of microtubules, which are long, thin, tube-shaped structures that are responsible for separating chromosomes during cell division. Microtubules are dynamic structures that can assemble and disassemble rapidly, allowing the spindle to change shape and position during mitosis.

Question 19

Chromatin condenses into chromosomes and the mitotic spindle begins to form during ____. ​

Accepted Answer

Chromatin condenses into visible chromosomes and the mitotic spindle begins to form during prophase. During this phase, the nuclear membrane also breaks down and the centrosomes move to the opposite poles of the cell.

Question 20

Chromosomes are in a condensed form at which stage(s)of the cell cycle? ​

Accepted Answer

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Quiz 10: Cell Division and Mitosis

Chromosomes decondense into chromatin at which point in the cell cycle?

Cytokinesis typically begins during which stage of mitosis?

Embryonic development begins with a single egg fertilized by a single sperm, forming a zygote which then divides by mitosis. How many cells are present in the embryo at the conclusion of four mitotic divisions?

During which phase(s) of mitosis are chromosomes composed of two sister chromatids?

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel E.

Karyotype analyses are performed on cells in ____ of mitosis.

Which statement best describes the difference between cell division in plant and animal cells?

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel D.

When plants are produced by cloning, which process is most directly involved?

Which sequence of the cell cycle is correct?

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel A.

Certain human cell types, such as skeletal muscle cells, have several nuclei per cell. Based on your understanding of mitosis, how could this happen?

Colchicine, a chemical extracted from the autumn crocus (C olchicum autumnale ) , inhibits the formation of microtubules. Mitotic cells exposed to colchicine will therefore be arrested at ____.

Organisms that reproduce asexually usually do so through the process of ____.

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel C.

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel B.

During ____, microtubules disassemble, pulling the chromatids to the ends of the spindle.

The mitotic spindle is primarily composed of ____.

Chromatin condenses into chromosomes and the mitotic spindle begins to form during ____.

Chromosomes are in a condensed form at which stage(s) of the cell cycle?

Quiz 10: Cell Division and Mitosis

Chromosomes decondense into chromatin at which point in the cell cycle? ​

Cytokinesis typically begins during which stage of mitosis? ​

Embryonic development begins with a single egg fertilized by a single sperm, forming a zygote which then divides by mitosis. How many cells are present in the embryo at the conclusion of four mitotic divisions? ​

During which phase(s) of mitosis are chromosomes composed of two sister chromatids? ​

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel E. ​

Karyotype analyses are performed on cells in ____ of mitosis.

Which statement best describes the difference between cell division in plant and animal cells? ​

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel D. ​

When plants are produced by cloning, which process is most directly involved?

Which sequence of the cell cycle is correct? ​

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel A.

Certain human cell types, such as skeletal muscle cells, have several nuclei per cell. Based on your understanding of mitosis, how could this happen? ​

Colchicine, a chemical extracted from the autumn crocus (C olchicum autumnale ) , inhibits the formation of microtubules. Mitotic cells exposed to colchicine will therefore be arrested at ____. ​

Organisms that reproduce asexually usually do so through the process of ____. ​

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel C.

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel B.

During ____, microtubules disassemble, pulling the chromatids to the ends of the spindle. ​

The mitotic spindle is primarily composed of ____. ​

Chromatin condenses into chromosomes and the mitotic spindle begins to form during ____. ​

Chromosomes are in a condensed form at which stage(s) of the cell cycle? ​

Chromosomes decondense into chromatin at which point in the cell cycle?

Cytokinesis typically begins during which stage of mitosis?

Embryonic development begins with a single egg fertilized by a single sperm, forming a zygote which then divides by mitosis. How many cells are present in the embryo at the conclusion of four mitotic divisions?

During which phase(s) of mitosis are chromosomes composed of two sister chromatids?

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel E.

Which statement best describes the difference between cell division in plant and animal cells?

Answer the following questions using the accompanying figure. Figure 10.1 Identify the stage of mitosis shown in panel D.

Which sequence of the cell cycle is correct?

Certain human cell types, such as skeletal muscle cells, have several nuclei per cell. Based on your understanding of mitosis, how could this happen?

Colchicine, a chemical extracted from the autumn crocus (C olchicum autumnale ) , inhibits the formation of microtubules. Mitotic cells exposed to colchicine will therefore be arrested at ____.

Organisms that reproduce asexually usually do so through the process of ____.

During ____, microtubules disassemble, pulling the chromatids to the ends of the spindle.

The mitotic spindle is primarily composed of ____.

Chromatin condenses into chromosomes and the mitotic spindle begins to form during ____.

Chromosomes are in a condensed form at which stage(s) of the cell cycle?