Thanks for the informative reply, it's appreciated!
I searched this forum before and I remember someone that said the 23 chromosome fusion is between 2 far apart populations, I may have interpreted it wrong and thought there's an intermediate state between 2 fused chromosomes.
I was also...
Human chromosome #2 is the result of the fusion of two ancestral chromosomes.
I know humans now have one less chromosome pair when compared to an ancestral population from a while ago, that the fusion didn't happen at once from certain parents to sons.
So what steps happened to arrive from 24...