The offspring will have three sets of chromosomes.
The offspring will be either diploid or tetraploid.
The offspring will be sterile.
Trick question. they can't reproduce because they are different species
Grass adapting to become more tolerant of metal in the soil.
Two populations of fish that were separated by the Panama landbridge.
Bees changing their breeding season in accordance with certain flowering seasons.
Birds being carried by a storm to a distant island.
Change in chromosome number