00:01
Okay, in order to answer this question, let's talk about inheritance.
00:03
It says the inheritance of colorblindness in humans is due to an excessive gene located on the x -kromsome, where this allele here is dominant over this colorblind allele.
00:16
Okay? so practically, if you have this genotype here, x plus x plus is going to be a normal vision person, normal vision.
00:26
Well, in this case, it is a female because it has the xx genotype.
00:30
When you have this genotype, you're going to be a heterocygous, and it means that you're going to be also a normal vision person, a female.
00:40
She's going to be a carrier for the disease.
00:43
It means she can have a son with a disease.
00:46
And finally, when you have the homozygoseous, you're going to be a colorblind female.
00:54
Finally, for males, males are xy.
00:56
So when you have this, it's going to be a normal vision male.
01:01
And when you have this, you're going to be a colorblind male.
01:04
So practically, males can be either normal vision or colorblind.
01:09
They cannot be cagers like females.
01:12
So it says if a colorblind boy, so a boy is going to be like this, colorblind boy is born to parents both of whom have normal vision, what are the genotype of three individuals.
01:24
So this is a song.
01:28
Remember that a song inherits or well, in general a child, well in this case a song inherits one a little from the mother.
01:34
And one from the father.
01:36
So the mother is going to have this genotype in general, okay? we don't know the specific all yet.
01:42
And this is the genotype for the father.
01:44
So the father is going to transmit.
01:48
When you talk about like fathers or fathers to sons, fathers are going to transmit the y chromosome.
01:57
And this is what is going to make a song a song, okay, because a song a song is a male and males have the white chromosome.
02:04
So this white chromosome comes from the father because the mother doesn't have a white problem...