Cell Cycle Quiz (Part 1)

2.

Fill-in: Name the structure of the cell involved in mitosis by typing the missing word/phrase in the box.During anaphase the separated chromatids are quickly dragged toward opposite poles of the cell because ______________ are already attached to each kinetochore and are exerting force.

Explanation
During anaphase the separated chromatids are quickly dragged toward opposite poles of the cell because microtubules are already attached to each kinetochore and are exerting force.

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3.

Fill-in: Name the structure of the cell involved in mitosis by typing the missing word/phrase in the box.The ______________ breaks down during prophase and reforms in telophase.

Explanation
During mitosis, the nuclear membrane, also known as the nuclear envelope, breaks down during prophase. This breakdown allows the chromosomes to be accessible for the process of cell division. The nuclear membrane then reforms in telophase, enclosing the newly formed daughter nuclei.

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1

4.

Fill-in: Name the structure of the cell involved in mitosis by typing the missing word/phrase in the box.In prophase, the two ______________ positioned near the nucleus begin to move apart toward opposite poles of the cell.

Explanation
In prophase, the two centrosomes positioned near the nucleus begin to move apart toward opposite poles of the cell. Centrosomes contain centrioles, which are involved in the organization of microtubules. The centrosomes act as the microtubule organizing centers, or microtubule organizing centers, in the cell during mitosis. They play a crucial role in the formation of the mitotic spindle, which helps to separate the chromosomes during cell division.

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5.

True-False:Meiosis II produces genetically identical diploid daughter cells.

True
False

Correct Answer

A. False

Explanation

Meiosis II is the second stage of meiosis, a type of cell division that produces gametes (sperm and eggs) in sexually reproducing organisms. Unlike meiosis I, which reduces the number of chromosomes by half, meiosis II is similar to mitosis and results in the separation of sister chromatids. This process produces four haploid daughter cells, each with half the number of chromosomes as the parent cell. Therefore, the statement that meiosis II produces genetically identical diploid daughter cells is false.

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6.

True-False:Homologous chromosomes find each other and line up close together during prophase I

True
False

Correct Answer

A. True

Explanation

During prophase I of meiosis, homologous chromosomes find each other and pair up closely in a process called synapsis. This allows for the exchange of genetic material between the homologous chromosomes, a process known as crossing over. This pairing and crossing over between homologous chromosomes are essential for genetic diversity and the proper segregation of chromosomes during meiosis. Therefore, the statement that homologous chromosomes find each other and line up close together during prophase I is true.

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7.

True-False:Sister chromatids separate in Anaphase I.

True
False

Correct Answer

A. False

Explanation

In Anaphase I of meiosis, homologous chromosomes separate, not sister chromatids. Sister chromatids separate in Anaphase II. Therefore, the statement that sister chromatids separate in Anaphase I is false.

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8.

Multiple Choice:Which genetic disorder results from a trisomy of chromosome 13 and is characterized by abnormalities that include harelip, cleft palate, unusually small eyes, profound mental retardation, structural heart defects at birth, and incomplete development of certain regions of the brain?

Down Syndrome
Klinefelter Syndrome
Patau Syndrome
Turner Syndrome

Correct Answer

A. Patau Syndrome

Explanation

Patau Syndrome is a genetic disorder that results from a trisomy of chromosome 13. It is characterized by various abnormalities, including harelip, cleft palate, unusually small eyes, profound mental retardation, structural heart defects at birth, and incomplete development of certain regions of the brain. This disorder is caused by the presence of an extra copy of chromosome 13, leading to the development of these physical and cognitive abnormalities. It is important to note that Down Syndrome, Klinefelter Syndrome, and Turner Syndrome are caused by different genetic abnormalities and have distinct clinical features.

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9.

Multiple Choice:Which is the result of failure of the chromosomes to separate during mitosis?

Inversion
Nondisjunction
Reversion
Translocation

Correct Answer

A. Nondisjunction

Explanation

Nondisjunction is the result of failure of the chromosomes to separate during mitosis. This can lead to an abnormal distribution of chromosomes in the resulting cells. It can occur during both meiosis and mitosis, and can result in genetic disorders such as Down syndrome.

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10.

Multiple Choice:What do you call the condition in which cells within the same person have a different genetic makeup whereby some cells have a mutant version of the gene while other cells in the same individual have a normal version of the same gene?

Aneuploidy
Cancer
Diploidy
Mosaicism

Correct Answer

A. Mosaicism

Explanation

Mosaicism refers to the condition in which cells within the same person have a different genetic makeup, with some cells having a mutant version of a gene while other cells in the same individual have a normal version of the same gene. This can occur due to genetic mutations that happen after fertilization, leading to a mixture of cells with different genetic variations in the body. Mosaicism can result in a range of genetic disorders and can affect various aspects of an individual's health and development.

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1

Cell Cycle Quiz (Part 1)

Quiz Preview

Fill-in: Name the structure of the cell involved in mitosis by typing the missing word/phrase in the box.During anaphase the separated chromatids are quickly dragged toward opposite poles of the cell because ______________ are already attached to each kinetochore and are exerting force.

Fill-in: Name the structure of the cell involved in mitosis by typing the missing word/phrase in the box.The ______________ breaks down during prophase and reforms in telophase.

Fill-in: Name the structure of the cell involved in mitosis by typing the missing word/phrase in the box.In prophase, the two ______________ positioned near the nucleus begin to move apart toward opposite poles of the cell.

True-False:Meiosis II produces genetically identical diploid daughter cells.

True-False:Homologous chromosomes find each other and line up close together during prophase I

True-False:Sister chromatids separate in Anaphase I.

Multiple Choice:Which genetic disorder results from a trisomy of chromosome 13 and is characterized by abnormalities that include harelip, cleft palate, unusually small eyes, profound mental retardation, structural heart defects at birth, and incomplete development of certain regions of the brain?

Multiple Choice:Which is the result of failure of the chromosomes to separate during mitosis?

Multiple Choice:What do you call the condition in which cells within the same person have a different genetic makeup whereby some cells have a mutant version of the gene while other cells in the same individual have a normal version of the same gene?