00:01
Okay, i want to answer this question, we have to talk about epistasis.
00:03
It says, which are the following types of epistasis, theater, two phenotypes? option a says duplicate genes.
00:10
And this is correct, okay? and why well, because let's give us an example.
00:16
As an example, let's talk about duplicate recessive gene or duplicate recessive epistasis, but it is going to be similar to the duplicate dominant epistasis, okay? so, for example, in duplicate recessive epistasis, when recessive alleles at either of the two loxite can mask the expression of dominant at the two loxite, it is called duplicate greciative epistachy.
00:41
Okay, for example, if we have the a gene and the b gene, okay, and we have here the genotype, whenever we have a, a, or b, b, it is going to express one phenotype.
00:56
Okay, so whenever the bb or the a is expressing it's going to be one phyptotype.
01:03
For phenotype number one, let's say.
01:07
Okay.
01:08
And what happens when you don't have this a, this homocego -rescessive or at either locks? you have 1a and 1b and the same here.
01:22
Well, or just like this, practically.
01:24
Okay? when you have this structure, it is going to be a phenotype number two, and you don't have any other possibility.
01:31
Okay.
01:32
So this is an example of duplicating recessive epistasis, and this is why this option is going to be a phenotype number.
01:36
Because the question is asking which of the following types of hypostasis, fear or only two phenotypes.
01:40
Okay, so here we're going to have only two phenotypes in a with this duplicate recessive epistasis or duplicate in general.
01:48
Option b says dominant and this is false, okay? because dominant is practically, for example, if you have the a dominant and the excessive a little, then this is going to be obviously dominant and this is a precessive.
02:00
So when you have this is going to be a, this is the gold depressive a dominant phenotype.
02:07
This is also going to express a dominant phenotype.
02:10
And this is going to express a recessive phyototype.
02:12
Okay, but this is indominal in recessiveness.
02:15
But in this case, we're talking about epistasis, so indominal epistasis, we're going to have two genes also.
02:21
Okay, let's suppose a a and b.
02:24
So whenever, let's suppose this gene is a epistatic.
02:26
So whenever the a is pressing in the phenotype, okay, it is going to express a phenotype number one.
02:38
And whenever, the homozygo -gessive is present, then you're going to express the phenotype that you have here in the beginning, so it can be this or it can be this.
02:49
So you have three phenotypes...
