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Mitosis
Introduction
There are five main phases of Mitosis, plus one that is included to certain cell types.
They are listed in order from:
- Interphase
- Prophase
- Metaphase
- Anaphase
- Telophase
- Cytokinesis
Precursor to Mitosis
Before mitosis is the phase in the cell cycle called interphase. This takes up 78% of the time in a cell's division cycle, and is the longest phase in the cycle.
Interphase consists of the three subphases called G1, Synthesis, and G2.
Prophase
14% of the time in a cell's cycle is spent in the prophase.
This is the second longest phase in the cell cycle, but the longest phase in actual mitosis. In prophase, the DNA supercoils into chromosomes, the nuclear membrane breaks down, and the centrioles move towards the opposite poles of the cell. The spindle microtubules also assemble.
Metaphase
4% of the time in a cell's cycle is spent in the metaphase.
In metaphase, the spindle microtubules then attach to the centromeres of the chromosomes and the chromosomes then line up along the equator of the cell.
Anaphase
0.8% of the time in a cell's cycle is spent in the anaphase.
This is the shortest phase in the cell cycle. In anaphase, the spindle microtubules shorten, the sister chromatids (two individual chromosomes paired and attached at the centromere) split into two identical chromosomes. The chromosomes are then pulled to the opposite poles of the cell proportionately.
Telophase
Roughly 3% of the time in a cell's cycle is spent in the telophase.
In the telophase, the chromosomes then unwind at their poles, the spindle microtubules break down, and the nuclear membrane reforms.
Cytokinesis (Not a separate phase)
Cytokinesis occurs at the end of the cycle, but is not actually a phase. This step either occurs during telophase or never occurs at all, in which case the cell fails to divide. In cytokinesis, the cytoplasm divides into two.
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What stage in the cell cycle performs the most important roles?
The organelles replicate in the G1 phase of interphase.
What happens during the four phases of mitosis?
Fist thing that happens is Interphase. This is what a cell spends most of its life in, but it is not part of Mitosis, it is before. Interphase is the duplicating of the cell's chromosomes( which hold the DNA). Next is Mitosis. I remember the four stages of Mitosis by PMAT. First stage of mitosis is Prophase, this is when the membrane surrounding the chromosomes is dissolved. Second stage is Metaphase, the chromosomes line up in the middle in pairs. Third stage is Anaphase, the chromosome pairs separate and go to opposite sides of the cell. Last stage of Mitosis is Telephase, the cell starts to split in half taking one of each chromosome. After Mitosis is Cytokinesis, this is when the membrane forms around the the chromosomes and the 1 parent cell is now 2 daughter cells.
The majority of the cells in your specimen were in which stage of the cell cycle?
A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division. The cell then leaves interphase, undergoes mitosis, and completes its division. Creative Biogene
Why mitosis has to come before cytokinesis in the cell cycle?
The most probable solution is that Mitosis requires alot of energy as well as a lot of nutrients to go through the process. Since Interphase is the beginning stage, the G1, S and G2 phases come into play and help create nutrients and energy.
Of the four stages of mitosis which one takes the most time to complete?
A cell spends the majority of its time in interphase when going through the cell cycle.
What stage of mitosis does a cell spend most of it's life?
When we look at the cell cycle, we see that the genome doubles (replicates itself) during the S phase. Since the M (mitosis) phase comes after the S and G2 phases, prophase of mitosis has the maximum number of chromosomes. Here, there are two copies of the genome.
What stage in the cell cycle performs the most important roles?
The organelles replicate in the G1 phase of interphase.
What happens during the four phases of mitosis?
Fist thing that happens is Interphase. This is what a cell spends most of its life in, but it is not part of Mitosis, it is before. Interphase is the duplicating of the cell's chromosomes( which hold the DNA). Next is Mitosis. I remember the four stages of Mitosis by PMAT. First stage of mitosis is Prophase, this is when the membrane surrounding the chromosomes is dissolved. Second stage is Metaphase, the chromosomes line up in the middle in pairs. Third stage is Anaphase, the chromosome pairs separate and go to opposite sides of the cell. Last stage of Mitosis is Telephase, the cell starts to split in half taking one of each chromosome. After Mitosis is Cytokinesis, this is when the membrane forms around the the chromosomes and the 1 parent cell is now 2 daughter cells.
What provided the information for cell growth and function?
The DNA is the molecule that provides theinformation for cell growth and function.
Why does skin cells spend less time during interphase?
Skin cells actually spend most of their time in the interphase stage. This is because cells spend their time preparing for cell division in this stage.
The majority of the cells in your specimen were in which stage of the cell cycle?
A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division. The cell then leaves interphase, undergoes mitosis, and completes its division. Creative Biogene
What stage does the cell spend most if its time in the cell cycle?
Interphase, which is the first stage in the cell cycle
How would you determine how much time the cells spend in each cycle?
Well, during mitosis the cell spends most of its time in the interphase and then moves on to cell growth and eventually cell division.
Does mitosis takes up most of the cell cycle?
Actually a combination of mitosis and meiosis take up most of the cell cycle.
Why mitosis has to come before cytokinesis in the cell cycle?
The most probable solution is that Mitosis requires alot of energy as well as a lot of nutrients to go through the process. Since Interphase is the beginning stage, the G1, S and G2 phases come into play and help create nutrients and energy.
Of the four stages of mitosis which one takes the most time to complete?
A cell spends the majority of its time in interphase when going through the cell cycle.
Based on the data in the data table what can you infer about the relative length of time an onion root tip cell spends in each stage of cell division?
Here's an idea, the different stages of mitosis have different amounts of time they spend in each. By counting the total number of cells and categorizing which stage each is in, you can then divide the number of cells in each stage by the total number of cells to infer the length of time each stage takes. Most likely metaphase is longest if I remember correctly.
