00:03
Okay, so this is problem 18, and we're looking at whether parents undergoing in vitro fertilization should have the right to choose which embryos to implant based on genetic criteria.
00:17
And the first option they give us is the presence or absence of disease causing cheats.
00:23
So let's take a look at a few different options for that.
00:26
So first, let's look at, i'm going to say autosomal, autosomal recessive.
00:44
Autosomal recessive.
00:47
And we're gonna say that's the disease causer.
00:51
Disease.
00:57
Okay.
00:59
And for this example, i'm gonna say one parent is affected and they don't want this gene to be passed on.
01:05
And the other parent is not.
01:10
Okay.
01:13
Well, as we can see here, none of the offspring are going to be affected because of our parent that is not a carrier or affected.
01:25
But let's assume one of our parents is a carrier and the other is affected.
01:39
Well, now you have to throw out 50 % of our embryos.
01:50
Okay.
01:52
Now let's assume that we have the opposite situation and our disease causing allele is autosomal dominant.
02:17
Okay.
02:20
And go through and erase solve this.
02:29
And now we have the same situation where one parent is affected.
02:35
I'm going to make them homozygous.
02:37
So they have two copies of the disease causing allele.
02:41
The other parent is not a carrier, not affected at all.
02:49
Okay...