00:02
Hi there.
00:03
We are working with the organism, cats here, and cats have a 2n or a diploid chromosome number of 38.
00:15
So if we have a cell going through meiosis, it of course is going to be diploid, so it will have 38 chromosomes.
00:24
That's the 2n number.
00:27
After the first division of myosis, the chromosome number is cut in half.
00:35
So now both of the the cells are one in.
00:39
Or in other words, they have 19 chromosomes each.
00:43
So this is after the first myotic division.
00:52
But meiosis, of course, has two divisions.
00:55
And this question wants to know if a single non -disjunction error happens during meiosis two.
01:03
So meiosis two is here.
01:08
And that is typically where the sister chromatids separate, and so we should still end up with a haploid number, or in other words, 19.
01:20
So let's say one of these separates properly, but the other one has non -dischunction...