I really agree. I think the problem is that when everything was being set up we had no clue about chromosomes. That seems to me the be a much better system. Same number of chromosomes, same species.
susie
“Same number of chromosomes, same species.”
Won’t work because chromosomes are not the same as each other. It’s like saying “the same number of coins equals the same amount of money”
Also, two wildly different organisms (say a plant and an animal) can have the same number of chromosomes.
And, just to make things confusing, it is even possible to have differing numbers of chromosomes in one species.