11. Platypus: Mixing Traits and Genes
The platypus, with its unique blend of mammalian, reptilian, and avian features, exhibits a genome that mirrors this diversity. It possesses genes for milk production, a trait characteristic of mammals, and also shares genes for egg yolk proteins with reptiles and birds, indicating its egg-laying nature. Additionally, the platypus has ten sex chromosomes, a configuration more similar to birds than to other mammals. (nationalgeographic.com) This genetic mosaic underscores the platypus’s position as a living link between different vertebrate classes. For a detailed exploration of the platypus genome, see the National Geographic article: (nationalgeographic.com)