(I thought I’d do my trope-a-day to match the Blogging from A to Z letters, too, if you’re wondering. That way everyone gets double the pleasure, double the fun… or at least double the posts.)
Belly Buttonless: Averted. Of course clones have them. How did you think they got their nutrition in the exowomb/cloning vat?
(Bioroids, now, they don’t have them because they’re assembled from the equivalent of 3D-printed organs on a framework, not grown as a single organism. But they’re meat robots, not any kind of natural being.)