Why Do Birds and Reptiles Make Egg Yokes?

Birds and reptile s have geans that allow them to make a protein known as vitelogenon, which is the main source of nutrients in an egg yolk. In us, they don't work because placentas, but we still have the geans. And since humans have gens for making egg yolks, some of our ancestors must have laid eggs, even though we don't do to day. So how can young earth creationists respond? One strategy is proposing god has done miracles, which could explain away the scientific data and still leave the universe young. But if you do that, you're no longer doing science. You're allowing your religious convictions to