In which of the following situations would one expect genetic drift to happen th
ID: 47833 • Letter: I
Question
In which of the following situations would one expect genetic drift to happen the fastest?
FST value of 0.01 and a movement rate of 10 individuals per generation.
I chose the first answer because an FST of 0.9 tells me that population is reproductively isolated, so any loss of alleles would contribute to drift. I am just having a hard time deciding between choice one and two, because a value of 0.5 is high as well, and 1 individual per generation is more...
FST value of 0.9 and a movement rate of 0.5 individuals per generation.Explanation / Answer
FST is proprtionally equal to 1 / (4Nm + 1)
FST = 1/(4Nm+1)
From this we can infere that if the product of FST and Nm is high then rate of genetic drift will be more i.e genetic drift will be faster. Again Nm is the number of migrated population so we can simply multiply m with FST as N will be constant for all.
(1) FST = 0.9 and m = 0.5 So, Product = 0.9*0.5 = 0.45
(2) FST= 0.5 and m = 1 So, Product = 0.5 * 1 = 0.5
(3) FST = 0.01 and m = 0.2 So, Product = 0.01 * 0.2 = 0.002
(4) FST = 0.01 and m = 10 So, Product = 0.01 * 10 = 0.1
So
(2) FST value of 0.5 and a movement rate of 1 individuals per generation will have the fastest genetic drift