00:01
In order to answer this question, let's talk about inheritance.
00:02
It says on an island, we simply separated from the mainland, there is a population of 10 ,000 frogs.
00:09
The eye color gene is on an outosome, and the red is completely dominant over the yellow eye allele.
00:22
And it says three in every 100 frogs have yellow eyes.
00:25
It means that aggressive phenotype.
00:27
And it says, assume the population is in hard on the human equilibrium.
00:30
And what is the frequency of the frogs with the yellow eyes? so in this case, remember that p plus q is equal to 1, where p is the frequency of alleles that are dominant in the population and q is a frequency for recessive alleles in the population.
00:42
You also have that p square plus 2pq plus q is equal to 1, where p square is the frequency of homocygous dominant, 2 pq is the frequency for heterocygoy and q is the frequency for homozygos recessive.
00:54
So in this case, they are telling you that 3 in every 100 have yellow i and yellow is the homocycus excessive.
01:03
It means this is for q squared.
01:06
So you have that 3 out of 100 is equal to q squared.
01:10
So 3 divided by 100 is equal to 0 .03, this is equal to q squared.
01:16
Now you have to apply with square at both sides you want to get the value for q.
01:20
And this is going to be equal to 0 .17 is equal to and as p plus q is equal to 1, then again means of p is equal to 0 .83.
01:33
Okay, so this is that this is the value for pnq.
01:36
And it says, what is the frequency of the frogs with the yellow eyes? so the frequency for the frogs with yellow eyes is, practically this frequency here, okay, 0 .03.
01:47
What the information that they are telling you that 3 in every 100 frogs have yellow eyes, then that's the frequency for a frog with yellow eyes, practically, okay? 3 divided by 100 that is equal to 0 .03.
01:59
The next question says, what is the frequency of the dominant aralil? and it means they are asking us for the value for p.
02:04
And p is equal to 0 .83.
02:07
This is the answer for question b.
02:08
Question c says, how many frogs in the population are expected to be heterocygos at the i color gene locus? so first we have to find a frequency for heterocygote that is the value for 2 p...