00:01
In this question, we are going to discuss forces of the evolutionary change.
00:08
So there are four major forces that act as a driving process for the evolutionary change.
00:15
So the first one is the mutation.
00:19
So let us write see what is the mutation.
00:23
So mutation, for example, we can say example of mutation is sickle cell anemia.
00:32
So in this case, what happens is there is a mutation in the beta globin chain of the hemoglobin.
00:45
So that is present in the sixth position of the glutamic acid.
00:51
This is usually replaced by the valine and it will create a disease or a condition called sickle cell anemia.
01:01
And this is very helpful for the malaria condition in south africa.
01:05
And the second one is the genetic drift.
01:10
So one of the important example of genetic drift is suppose a population of a rabbit, if it contains both brown and white fur, then but due to some environmental condition, the population of white fur is wiped out and only the brown will exist...