00:01
In order to answer this question, let's talk about inheriting.
00:02
It says individuals, three and three forms, and this one and this one, are expecting their first child when they become aware that they both have a family history of this recessive condition.
00:15
So this is a recessive condition, specifically autosomal recessive because of this nomenclature here, okay? as their genetic concealer, you can calculate the probability that they are cagers and that their child will be affected with the condition.
00:28
So first, let's find the probabilities that both of them are kagres, okay? and we have to look at the family history.
00:34
For example, according to this panana square or opetic demsal grid, we know for sure that genotypes for this apple here.
00:41
So let's make a panetta square.
00:43
Homocygos -domin and heterocigos -domin with a hetero -sigose.
00:45
You get homo -sigos -domin and heterocylus and heterocytocles.
00:51
So you have a total of four possibilities.
00:53
And all of those four possibilities, how many are going to be? heterocigos, because that's what you want here, right? so, out of four possibilities, it is one or two are going to be heterocycles and you can simplify this and you're going to get one half.
01:05
So you have one half chances for these three four to be heterocycles.
01:12
Now what are the chances that this person here is heterocycles? so one person here is one alley from each parent.
01:22
In this case, this person here has a disease.
01:25
So it means that he is homozyg excessive.
01:28
And as i told you, one person in here is one from each parent.
01:30
So in this case, one recessive r came from the mother, okay? in the model, it has a recessive r.
01:37
This is why she has a recessive r, okay? and it means that the second recessive r came from the father.
01:43
So the father has another recessive r, but as he does not have the disease, then it means that he is not oppositesive but also heterocybozybo.
01:53
So you have a cross between co -hitrozygos, and you have the following panel square, homozygous, nominal, heterocybo, heterocygous, heterocygous and homocygous, okay? so you want the chances that this woman or this man, i'm sorry, is heterozygos...