@Ray thanks for the tip! By the way, I read that Cavendish bananas (the ones you get at the supermarket) are actually triploid and all Cavendish bananas are actually cuttings from one ancestral plant. And now there's a banana blight that's killing the Cavendish bananas and since they are triploid and can't reproduce, they all have the same DNA and have no resistance. :O
@estacion seca thanks for the advice! I'll go check out the book.