00:01
Which of these sequences represents a correct order that results in the development of an embryo? so we have four options here.
00:10
And we want to go from two parents to an offspring.
00:23
So just give a blob for the embryo.
00:26
So how do we get here? well, first of all, we know that we are diploid organisms.
00:32
Each of our cells has pairs of chromosomes.
00:34
As humans, our cells have 23 pairs.
00:37
So each of these individuals has 23 pairs like this.
00:42
So this is going to be the same chromosome and it's a pair for each.
00:45
The embryo also needs to have a pair.
00:49
It can't have too many or too few chromosomes.
00:53
So the cells of the embryo, we also know that they get half of a genetic material from each parent.
01:01
So they're going to have something like this.
01:04
They're getting one chromosome from each pair from each parent.
01:07
So how do we make that work? well, we have to use meiosis.
01:13
So each parent has to carry up meiosis to produce what we call gametes.
01:21
So that would be the egg and the sperm cell...