00:01
Okay, i want to answer this question we have to talk about inheritors, okay? question 29 is incomplete, i think.
00:11
Yeah, question 29 is incomplete, so i'm not going to be able to solve it because, like, i need the complete, like, information, okay? so let's look at question 30 that says, one form of hemophilia is caused by a sex -ling recessive gene.
00:27
Assume that a man with hemophilia marries are phenomenally normal.
00:30
Woman whose father had a hemophilia.
00:32
So practically by answering question 30, you're going to be able to answer question number 29.
00:37
You have to understand question 30.
00:39
So let's suppose that this is a normal ex -alil, the normal allele.
00:45
And this is the mutant alil, the hemophilia alil.
00:51
So remember that females are x, x and males are x, so females are going to be, or this genotype is going to be a normal female.
01:01
This genotype is going to be also a normal female, but a carrier for that this is a carrier for hemophilia because she has only one recessive or hemophilia galline.
01:11
And this is a leal is recessive.
01:13
So in order to express a disease, you need two hemophilia alleles and this is going to be a hemophilic fibing.
01:19
In case of males, you are not going to have carriers because you have only one x chromosome.
01:23
So you're going to be a normal male and this is going to be a hemophilia male.
01:28
Okay? so these are the genotypes that you have here and the phenotypes.
01:34
So, so here it says, well, assume that a man with hemophilia, so a man with hemophilia, you have only one possibility that is this.
01:45
This is a man with hemophilia.
01:47
Magu is a phenotypical, normal woman whose father had hemophilia.
01:50
This is very important because remember that a woman or a man or a person or an individual in general is going to inherit one allele from the mother and one alien from the father.
01:58
This is the mother and this is the father.
02:00
And i suppose that this person here is homozygonousity for a.
02:03
So it means that this a came from the mother and this a came from the father.
02:07
So both of them are going to have at least one which is if they are in their denotent.
02:11
Okay.
02:11
So we're going to apply the same.
02:12
He says that you have a woman who is normal.
02:17
But it says that this woman's father had hemophilia.
02:20
So the father is like this.
02:22
So this father can only transmit a mutant x chromosome to this woman here.
02:27
So this woman is going to have at least one mutant chromosome...