Hey, I'm brand new here. Hello everybody! Unfortunately, I am not very scientific but I have a scientific question to ask, well a few actually... They're probably more mathematical but ANYWAY!

I'm looking into the fixation of a new allele (dominant or recessive)... and I understand (2/s) ln(2N) will give me an answer. Only, I have no idea WHAT (2/s) ln(2N) means in any way, shape or form... Well, TBH, I know 's' is the selection coefficient, for example 0.1 and 'N' is the population, for example 1 million. Heck, I even know that in (2/s) ln(2N) with s=0.1 and N=1,000,000 the answer is around 300. However, I have no idea WHY it's 300.

Question number one - Could anyone possibly explain (2/s) ln(2N) to me in a way that a newborn baby could understand? And if that's asking too much, I will cut to the point and ask what I REALLY want to know.

1. This new allele would have 3 edges. 1. People possessing it would be more willing to kill and do whatever it takes to stay alive. 2. People possessing it would actively hunt people not in possession of it. 3. People possessing it would have A LOT of children on account of r*pe and promiscuity. With these 3 things in mind, what number would you assign the new allele for it's selection coefficient... 's'?

2. I would like to know how many generations it would take for this new allele to become fixed in a population of A. 1 million, B. 500,000, C. 200,000, D. 100,000, E. 50,000, F. 20,000 and G. 10,000.

3. I don't know if dominance makes a difference but if it does, I would like to know the answers to 2 in the event of this new allele being A. dominant and B. recessive.

Now, if someone can explain the formula to me, I'll be more than happy to do the legwork and figure out the answers to 1, 2 and 3 on my own! Or maybe you know of a piece of software, a kind of calculator that could help? Anyway, if it's easier to simply provide me the answers, I won't complain... :P

I hope I'm not asking too much of you all but I will really appreciate any help you can provide!