00:01
Okay, i want to answer this question, let's talk about the cell cycle.
00:04
Remember that your chromosome initially is going to be like this.
00:07
If you're using your cells, for example, your chromosomes are going to be like this.
00:13
This is one pair of homologous chromosomes.
00:16
This is before the cell cycle starts.
00:20
During the interface of cell cycle, specifically at g1, this is how your g1 is going to look like.
00:29
Your cell is going to be deployed.
00:31
And after the ace, s phase, it means in g2 phase, after remember that during s phase, dna replication occurs, after s phase, you're going to have your chromosomes like this, like this, okay? also, this cell is going to be deployed to, okay? because this is a single chromosome, and this is also one single chromosome, because you count chromosome number by the number of centromers.
01:02
You have here one centromar, also one centromer, and one centromer.
01:06
Okay.
01:06
So here you have, for example, two chromosomes and here you have also two chromosomes.
01:10
But in this case, you have one chromatid here.
01:13
This is one chromatid, one chromatid, and this is another chromatid.
01:20
Okay, and in the same here.
01:21
But in this case, you don't have chromatids.
01:24
Okay, so these are sister chromatids.
01:26
And then after the mitosis, what is going to happen is that they're going to produce two cells that are similar to the parental cell because they are going to look like this.
01:43
They are going to look like this cell here.
01:46
And they are also going to be deployed.
01:50
Remember that during the during mitosis, during prophase, your cell is going to be deployed also.
01:56
And during metaphase, they are going to be deployed also.
01:59
Because they are going to be found like this.
02:06
This is during metaphase.
02:08
But during ana phase, and before cytokine, okay, remember that during anapace, your spindles are going to retract and they are going to separate that sister chromatids.
02:21
We are going to have this.
02:28
I'm more chromatid here and another chromat here.
02:34
So once the sister chromatis separate and now each of them is a chromosome.
02:39
And as the cell has not been divided yet, then this cell is going to be 4a, 4a.
02:48
Okay because after cytokinesis occurs then you're going to have 2n and 2n that is going to be similar to this parental cell but as cytokinesis if cytokinesis does not occur yet then your cell is going to be 4a then the question says in a cell in g1 of interface has 12 chromosomes so you have first here 12 how many chromosomes and dna molecules dna molecule they are actually figuring too each chromatid here, okay? each chromatic or sister chromatis is referred to one dna colloquium.
03:25
It will be found per cell when this original cell progresses to the following stages.
03:31
First question, it says, prophase two of myosis.
03:35
So in prophase two of myosis, which is your cell, well, let's state myosis first.
03:45
You start with a deployed cell and you produce two applied cells after myosis one, and then each of these cells during myiosis 2 is going to be converted to gametes, okay, that are going to be applied.
03:58
So, prophys 2 is the first stage of myosis 2...