Cell Cycles: Interphase, Mitosis, Cytokinesis - SchoolWorkHelper
Both Mitosis and Cytokinesis are a part of cell division. Basically There are other subtle differences between the two. The process of Mitosis occurs in three phases-namely Interphase, Karyokinesis and Cytokinesis. sexual reproduction. Chromosome chromatin cell cycle. Interphase mitosis cytokinesis. Prophase What is the relationship between interphase and cell division? Why must the Compare and contrast cell division in plant and animal cells. 8. Cytokinesis, Occurs in Telophase I and in Telophase II. Occurs in Telophase. Cells spend about 90% of their existence in a stage known as interphase. Because cells A diagram showing the differences between meiosis and mitosis .
So let me copy and paste.
So this right over here, actually let me, I did that just to save time. So let's say this is a cell, so green. I have it's nuclear membrane, or not nuclear membrane, I have its cell membrane. Inside of that, of course, you have all of the, all of the cytosol, and then this, in this orangeish color, I have the nuclear membrane that defines the nucleus.
And then inside of that I have the DNA. And you might be used to seeing DNA all tightly bound, or chromosomes all tightly bound like that and like that or like this, this would be another chromosome right over here in magenta. But during interphase, the chromosomes aren't tightly bound like that so that they're easy to see from a traditional or a simple light microscope.
For most of a cell's life, the chromosomes are completely unwound. They are in their chromatin form. So they are in their chromatin form. It's actually hard to see if you have just a simple microphone laughing a simple microscope. It's all unwound, you just have the proteins and the DNA, it's all tangled together.
Now there's one other thing that I drew here. You might say, why am I drawing it when I haven't drawn most of the other organelles? But I'm drawing this thing, which is called a centrosome, 'cause it's going to be important for, it's going to be important for when we go into mitosis.
Now, this drawing as well, you might say, wait, doesn't a cell, at least a human cell that has a diploid number of chromosomes, and once again, if we're not talking about sex cells, we're talking about just our somatic cells, doesn't it have to have 46 chromosomes?
It looks like you only drew two. And it is true, I only drew two chromosomes for the sake of simplicity, we're just going to assume that this is the cell of some organism that's much simpler, that it only has two chromosomes.
So anyway, this is the new cell right over here. It is going to grow. So it is going to grow, it's going to take in nutrients from its environment, and it's going to grow as we would expect it to. So that's that right over there. And then let me give it its nucleus and its centrosome just like that.
And this phase, this phase, where it is just growing from this new cell, this is, this phase right over here, is the G1 phase, the G1, actually I'm gonna do that in a different color since I'm already using that green so much.
How to Differentiate Between Mitosis & Cytokinesis | Sciencing
This is the G1 phase and so that might look something like this, different cells are going to do this for different periods of time, the G1 phase. But then you can imagine, well look, it's going to need to replicate some of the, or, it's gonna replicate the information inside of, or that's coded by the DNA at some point, and actually, this happens before mitosis.
So let's depict that. So let me draw, let me draw the nucleus and the centrosome again. Let me draw that again. Let me draw the cellular membrane. This nice healthy growing cell.
Difference Between Cell Cycle and Cell Division | Phases, Characteristics, Regulation, Comparison
And now, its DNA is actually going to replicate. So instead of having one copy of its DNA, it's essentially going to go to two copies. But I wanna be very very careful now. So if I draw that magenta chromosome up here, so once again it's all unwound like that. But it was one chromosome before, it was one chromosome when it was just like this, and it's still one chromosome, even though it's copied its genetic material.
Let me draw this a little bit neater. So this is one chromosome right over here. And that one chromosome, after it's copied all of its genetic material, it is still one chromosome.
- Difference Between Cytokinesis and Mitosis
- Difference Between Cell Cycle and Cell Division
- Cell division
Now how do we, but there's two copies over here, what do we call these two copies? Well, each of these two copies are called a chromatid and these two right over here, these are sister chromatids.
But either way, this is one chromosome right over here. And this is also, so this is one chromosome right over there, and that is also one chromosome. This whole thing right over here is also one chromosome.
Cell Cycles: Interphase, Mitosis, Cytokinesis
Later on, when we go through mitosis, we'll see that these two sister chromatids get split apart, they're no longer connected. Mitosis occurs in four stages and ends with cytokinesis. Each stage features very specific movement of parts of the cell and development of parts of a new cell. Mitosis and cytokinesis can be identified by positioning of the cell parts within the cell wall. Basics of Mitosis Mitosis is a four-stage process, including prophase, metaphase, anaphase and telophase, that occurs in preparation for cell division.
Prior to cell division, the cell is in the interphase stage, which includes cell growth in preparation for replication and the replication of cell DNA.
The critical portions of the cell that should be identified prior to thinking about stages are: In animal cells, the centrosome duplicates during the interphase stage.
In plant cells, this duplication occurs in the first stage of mitosis. Each centrosome serves as an organizing mechanism during the final cell division stage. Prophase and Metaphase The prophase stage can be recognized as the chromosomes start to coil. Another distinguishing feature during prophase is the disappearance of the nucleolus.