00:01
When we look at the blood types of humans, there's three main genes that we look at, which will tell you whether or not someone is a positive or o negative or whatever.
00:11
For this question, we're only looking at one gene, which is the m and n gene.
00:18
So they are co -domin, which is why they're both dominant m, dominant in on the dominant l's.
00:25
And we're told that im has a frequency of 0 .8, meaning that 80 % of all the alleles for this gene are im.
00:37
Then it stands to reason that the other 20 % are in.
00:45
And that follows with the hardy -winberg equilibrium equation, which tell us allel frequencies.
00:51
Right.
00:52
Frequency of one allele plus the frequency of the other should equal one, or should equal 100%.
00:59
Which is true here.
01:02
Then we can utilize the other hardy wine -work equilibrium equation to find out the frequency of the genotypes.
01:18
So if in these equations, p represents our m allele, then p squared is just having two ims.
01:27
And likewise, if q represents the n allele, then q squared is having two ns.
01:31
And then two pq, having both p and q, you are homozygous.
01:40
So then if we want to calculate, you know, what is the frequency of people having both m alleles? all we have to do is multiply the value of n by itself.
01:57
And if you want to calculate the frequency of having, being heterozygous, having n and m, you just follow this equation or it's two times m times in.
02:12
So being heterozygous has a frequency of 0 .32 % of the population.
02:26
And then finally we come to in -in.
02:30
And again, you just follow the equation where you take the value of in and you square it.
02:36
So then the frequency of having two in alleles at this gene in the population is 0 .04...