Board Thread:Fossil Fuels/@comment-3213993-20140925072347/@comment-1259419-20140927080541

Jurassic Park Treasury wrote: Technically, if you compared the genes of crocodiles and birds, you wouldn't have a dinosaur gene, but a gene from a primitive archosaur. If you compared only bird genes, you would get ancestral bird genes. And if you know the sequences from the primitive archosaur and the ancestral bird, you could make an estimation what dinosaur genes could have looked like. Same logic like this: Primitive archosaurs like Turles have a Z chromosome, birds have a Z chromosome --> dinosaurs (well at least the primitive Saurischia and Theropods) had a Z chromosome.