00:01
Hello and welcome again.
00:02
We want to use this table.
00:04
We have three set of population, a series of population.
00:08
We have a series of population, population 1, 2, through 4.
00:14
And we have time, okay? so it's like we're going to assess population numbers against time.
00:22
And we're going to talk about allelic frequencies here okay allelic frequencies and we know that if a population a particular population is evolving evolution means adaptation because adaptations enables evolution so a particular population will be evolving if it's allelic frequencies change over time okay if it will say p and q we have 0 .1 and 0 .0.
00:56
Over a period of time you'll get that p is around 0 .3 and q is 0 .4 this particular population is evolving or you can have that you can get as an error where the p is 0 .1 and q is 0 .5 over a period of time you see in this case p has not been favored in these varmiter conditions as q is favored because a q has increased from 0 .3 to 0 .5 so this is another scenario where you will get this population, particular population has been favored and it's evolving so then if we look at the case scenario given so when we say the allelic frequency is changing it can be as i've said okay, maybe preferred selection over a allel.
01:46
Okay, so if this particular if really frequency does does not change for instance if we have p and q 0 .1 and 0 .2 and over a period of time again you still get was 0 .1 0 .2 these particular frequency rather population is in the windbag's equilibrium okay so let's look at population 1 okay now quickly this let's assess population 1 from the table and if you look at population 1 frequencies of p and q, we have 0 .25 and 0 .75.
02:38
Over a period of time, we still get the same.
02:42
This is from 2 or 4 through to 2012.
02:49
P, q are still the same, so we have 0 .25, 0 .75, the same 0 .25, the same 0 .25 and 0 .75.
02:59
So you see, these are, there's no change here...