00:01
Not yet to answer this question, let's talk about chromosomes.
00:02
It says a young couple is starting to have children.
00:05
And it says a chromosome analysis that whereas the woman has a normal cryotype, it means a woman has a 2 -end of 46 and when she produces the meat, all their eggs are going to be normal.
00:19
It means all of their eggs are going to produce 23 chromosomes.
00:23
I'm going to have 23 chromosomes.
00:25
And it says that the man possesses only 45 chromosomes.
00:29
It means that this is the diploid.
00:32
For this man.
00:33
Let's make it bigger, but it is.
00:36
Okay.
00:37
In this actuarial of a gover and translocation between chromosomes 22 and 23.
00:41
So it means that this man has one chromosome 13 and one chromosome 22 and he has a gover zone and translocation.
00:52
It means if this was the original chromosome 13 and this was the original chromosome 21, the short arms were removed and this piece of the chromosome 203.
01:04
Fuse here with a chromosome 13.
01:07
So you have this 21 and 13.
01:10
So as these are the long arms of the chromosomes that have most of the genes, then this segment here is going to count as one chromosome 21, and this segment is going to count as one chromosome 13.
01:20
So practically this man is going to be phenotypically normal, because he practically has two copies of chromosome 21 and two copies of chromosome 13.
01:29
Now it says, a list all the different types of gametes that might be produced by the man.
01:34
So what are the possibilities here? well, one possibility is that this chromosome 13 move together to one dollar cell.
01:46
So you have 1 ,13, and 0, 21.
01:52
You don't have a chromosome 21.
01:55
Another possibility is that this chromosome 13, well, obviously if this happens, then the second cell is gonna have the hybrid chromosome with the chromosome 21.
02:09
Another possibility is that the chromosome 21 move alone, and you have a other cell with chromosome 21, and another cell that has both of these chromosomes, that's 13 with the hybrid.
02:32
Another possibility is making here is that the chromosome 13 and 21 move together, and another possibility here, is that the hybrid chromosome moves along.
02:54
So you have this and this.
02:58
So these are the six different possibilities for the gametes that this man can produce.
03:05
So this is the answer for question a...