I asked the professor whether he believed that evolution occurred gradually over long periods of time, or rather was the result of some sudden change. He, like most, answered that it was the result of imperceptible changes over a long period of time.
I then asked if he believed in genetics and, more specifically if he believed in chromosomes. And of course he did.
I pointed out that humans (capable of reproducing anyway) have 23 chromosome pairs, and that at sometime we must have "evolved" from some animal with 22 pairs, or possibly some other number. But since the simplest animals have just one pair end we evolved from them we must have made the jump to 23 pairs at some point along the way. I asked him how this could be done gradually. He didn't have an answer. (The conversation was a little more detailed than this, but that's the gist of it.)
ML/NJ