High School Biology : Understanding Stages of Mitosis
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Example Questions
Example Question #21 : Understanding Stages Of Mitosis
What are two major events that occur in prometaphase?
The spindle is only beginning to form and the chromosomes are lined up on the metaphase plate.
Chromosomes become condensed and the nuclear envelope breaks down.
The nuclear envelope is still intact and the chromosomes become condensed.
The nuclear envelope breaks apart, the mitotic spindle reaches the chromosomes.
The nuclear envelope breaks apart, the mitotic spindle reaches the chromosomes.
During premetaphase the nuclear envelop has broken down and this allows the spindle, or the microtubules, begin to attach to the chromosomes at the kinetochore. The microtubules begin to put force on the chromosomes to begin moving them to the middle of the cell.
Example Question #21 : Mitosis
What is interphase?
The phase when the actual cell division occurs.
None of these.
The phase when the cell begins preparations for mitosis.
It is the first phase of mitosis.
The cell arrest phase.
The phase when the cell begins preparations for mitosis.
It is important to remember that interphase is not actually a part of mitosis, but rather is the preparation phase, setting the stage for mitosis to occur. Cells spend most of their time in this phase. During interphase the cells make copies of its structures and duplicates its chromosomes during DNA synthesis. The G1, S phase, and G2 phase all make up interphase, (if you remember from the previous question).
Example Question #21 : Mitosis
Please name the first stage of mitosis and two things that occurs during this phase.
Metaphase; the spindle is fully formed.
Prophase; the mitotic spindle forms and chromosomes become more pronounced.
Telophase; chromosomes line up on the spindle.
Metaphase; the nuclear envelope breaks down.
Prophase; chromosomes line up on the spindle.
Prophase; the mitotic spindle forms and chromosomes become more pronounced.
Prophase is the first stage of mitosis. The cell cytoplasm and nucleus undergo several changes. At this point the mitotic spindle is forming but the nucleus is still intact. In this phase the chromosomes become tightly packed and the nucleoli disappear. Each chromosome is paired with its sister chromatid joined in the middle at the centromere.
Example Question #181 : Cell Biology
What phase is the cell above currently in? How can you tell?
Metaphase; you can tell because the chromosomes are neatly lined up in the center of the cell on the mitotic spindle.
Telophase; you can tell because there is no nuclear envelope anymore.
Anaphase; you can tell because the chromosomes are neatly lined up in the center of the cell on the mitotic spindle.
Prometaphase; you can tell because there is no nuclear envelope anymore.
Prophase; you can tell because of the cell's shape.
Metaphase; you can tell because the chromosomes are neatly lined up in the center of the cell on the mitotic spindle.
The condensed chromosomes are aligned on the metaphase plate (an imaginary line in the middle of the cell). They align this way because of the microtubules that are pulling them to the opposite sides.
Example Question #22 : Mitosis
In what stage of mitosis is the cell shown in?
Prophase
Prometaphase
Telophase
Anophase
Metaphase
Prometaphase
The cell in the picture about is in the prometphase stage. Key indicators of this phase are the breakdown of the nuclear envelope around the genetic material and the spindle beginning to interact with the chromosomes.
Example Question #23 : Mitosis
In what phase of mitosis is the cell shown?
Metaphase
Anaphase
Telophase
Cytokinesis
Prophase
Prophase
The cell pictured above is in prophase. Key indicators that the cell is in this stage are that the nuclear envelope is still intact and chromosomes have become condensed and paired up with sister chromatids.
Example Question #182 : Cell Biology
What is the difference in chromosome number, in each daughter cell, between mitosis and meiosis?
Mitosis ends in a diploid cell and meiosis ends in a haploid cell.
Meiosis ends in a dipliod cell and mitosis ends with a haploid cell.
Both mitosis and meiosis end with two diploid cells.
Mitosis ends with two diploid cells and meiosis ends with 4 haploid cells.
Both mitosis and meiosis process end with two haploid cells.
Mitosis ends with two diploid cells and meiosis ends with 4 haploid cells.
Mitosis has only one round of chromosome separation and creates all cells, other than sex cells. For example skin cells. This process ends with two diploid cells that are genetically identical to the parent cell.
Meiosis is the process that generates the cells that occur in sexual reproduction cells, otherwise known as gametes. This process, since it has two rounds of chromosome separation, will end with 4 haploid cells, or half the genetic information of the parent cell.
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