00:01
What is the result of ogenesis? 4 diploid over, 3 diploid over, 1 haploid polar body.
00:11
1 diploid ovum, 3 polar bodies, 2 haploid over 2 polar bodies, or 1 haploid ovum, 2 to 3 polar bodies.
00:21
Okay, so ogenesis is the production of the egg cell.
00:24
So it's going to be a gamete, and gametes are haploid.
00:27
So the ovum is a gamete, it will be haploid.
00:34
Most of your cells are diploid, but your gametes are haploid because during fertilisation, you have two haploid cells, the sperm and the egg, fusing to become a diploid zygote.
00:47
So we can rule out the ones that save it, but the ovum or over will be diploid.
00:53
Which only brings us down to two possibilities.
00:55
So how many over are there? how many polar bodies.
00:59
So to get the gametes, we need to carry out meiosis.
01:02
And we have meiosis 1 and meiosis 2.
01:06
So we're going to start out with the primary oocyte.
01:11
So this is a diploid cell, and it's about to undergo meiosis to give us the mature ovum.
01:17
So meiosis 1, it divides into two daughters.
01:22
But inogenesis, it does not divide equally.
01:26
One cell gets the absolute bulk of cell matter, so it is much larger.
01:32
And the other is very small.
01:34
Both of these are haploid.
01:36
This is the secondary oocyte...