Obsessed today with the genetics of The Muppets Christmas Carol. The movie depicts a truly mixed society of humans and Muppets. Families seem to be one or the other, suggesting two fully separate lineages living side by side. The majority of characters are either human or Muppets of a vaguely animal or creature shape. However, there are also a few human shaped Muppets. Could they be rare hybrids? Then there's the Kermit-Ms. Piggy pairing, which produces only male frog and female pig offspring.