It would, in fact, ENFORCE that there was no genetic merging of the lines, if there were genetic problems with interbreeding.
So you are completely wrong about that and have, once again, no mechanism to explain what would stop a 2% genetic difference from accumulating, and apparently neither are you intelligent enough to understand that your proposed mechanism would in fact increase the likelihood of what I propose rather than making it impossible.
Would you like to try again?
What is going to stop a 2% genetic difference from accumulating over time in two separate populations of what once was the same species?
So your argument is that the small changes accumulate over time, a long time until the species “hops over the edge”, and becomes a new species?
By that logic, it would happen in one generation that two creatures would suddenly stop being able to breed with each other, and then diverge and become another species.
Now, here’s a question for you. Has this ever been observed? How does this square with the catastrophists who admit that evolution cannot be a slow mechanical process. Becaues there’s simply not enough time for these changes to result in what you would see.
So here’s my question, given a guaranteed mutation in one base pair, how long would it take to cross the gap between a man and a chimpanzee? That’s 150k base pairs.
You would be looking at 150k successive changes in one direction. Assuming equal drift between men and monkeys, and a population of men around 500 million people, that would mean 2 ^ 150000 / 8k (births a year).
That makes it a 1/8x10^18 power chance of it occurring over 2 million year. Assuming 5 billion instead of 500 million, gives us a 1/8x10^17 power chance of this occurring.