00:01
Let's answer this question.
00:01
Let's talk about inheritance.
00:02
He says, assume that mendel looked simultaneously at four traits of his pea plants.
00:08
In each trade exhibited dominance.
00:10
If he crossed a homocygous dominant plant with a homocyglysis plant, so you have here four traits.
00:16
Let's suppose you have a, b, c, and d.
00:26
So you have a homocygous dominant plant that is like this, with a homocygous, and it says all the f1 often were exhibited the dominant phenotype obviously because all of them would be hydrocyrosyose.
00:50
Now it says if he self the f1 plants how many different types of gametes would be produced? so they are asking you the gametes produced by this organism here.
01:01
So in order to get the gametes, or well, they are not even asking us to find what are the different gametes.
01:06
They are only asking us about the different gametes.
01:09
And what you have to do here is that, is to see how many different letters you have.
01:14
For example, for the a in you have one dominant a and one decisive face.
01:18
So you have two different, all this, so you have two.
01:20
The same here, you have two different allele.
01:22
So you have two different alleleys and also here you have two different allele.
01:26
So you have to multiply this and you're going to get 4, 8, 16.
01:30
So you have 16 different different gametes produced from this parent.
01:37
Now it says how many different phenotypes would appear in the f2 generation? so first list you are going to...
01:44
This is practically going to be your cross for the f2.
01:56
This is going to be your cross, okay? so in this case you can cross this heterocygous a with this heterotigos a, this heterotigos b, the same for the c and the same for the d.
02:08
So for all of them, you're going to get one quarter to get homozygos dominant, one half to get.
02:15
For practically, well, you can write it like this, two quarters to get heterocygios and one quarter to get homozyrolysis for both of them for all of them but for the a for the for the b for the c for a d we're going to get also homo sego dominant b hydrosygos b the same for the c and so on okay so we can make like a very general branch diagram here for example you can get the homoseygous dominion here the heterocygous here and the homosylosephicative here and we can cross this this homozygous dominant a with that, homozygloid and b, with the homozygousine b, and then the same for the seeding and when you have the seeding, for example, like those signals, hydrozygos, also here, how some of the co, hydrocygos, how you say, excessive, how you're going to have the same bad for that, then one, two, three, one, two, three, one, two, three, one, two, three, one, two, three, one, two, three, and the same for all of them.
03:22
So as you can see here, you're going to get total of.
03:24
You're going to get here in all of these possibilities, 27 possibilities...