00:01
So it says there are 46 chromosomes in this karyotype.
00:03
That is false.
00:06
There are definitely more than 46.
00:11
Two, this is a male child.
00:13
That is true.
00:14
Although males are xy, this karyotype is xxy, which means this male would classify as having klinefelter syndrome.
00:24
There are multiple trisomies in this individual.
00:27
That is true.
00:29
A trisomy means that there are three chromosome pairs.
00:32
Pairs instead of two.
00:41
Well, three chromosomes in a pair instead of two.
00:44
This karyotype results from a nondisjunction of an entire cell.
00:48
Based on this karyotype, i would say that that's true.
00:51
So trisomy occurs when two chromosomes, they're supposed to pull apart in anaphase, but in one of the forming gametes, they don't.
00:58
And that's how we end up with a trisomy.
01:00
And the fact that every single chromosome has three instead of two, i would agree that an entire sex cell trisomied here.
01:10
Five, the haploid number of this person is 34 or 35.
01:15
So if you think that they have 46 chromosomes plus 22 or 23 extra, because they had, they got an entire, another half set, that their chromosome number is 69.
01:32
And when you divide that by two, you get 34 .5.
01:37
So 34 or 35, you know, that you can't split a chromosome in half, depending on where that chromosome goes.
01:45
This individual may have been miscarried...