[yayo]

It's hypotheitical.

We think that species A evolved into species B. We've run the genome of A and B and are very confident that A became B for a number of reasons.

Species A has 15 pairs of chromosomes and species B has 16 pairs.

How did the first member of species B find anyone with whom it could successfully mate? How would B's haploid gametes fit with A's given the mismatch in chromosome count?

In which species have wee seen this? How would this work with ring species?

I'm procrastinating here. I should really get to work...