For example, scientist think that dinosaurs and birds lay eggs the same way and have similar bone anatomy. Modern day birds, scientists agree, are closely related to two-legged meat eating theropods like T-rexes and velociraptors.
The key to reverse engineering a dinosaur from a chicken lies in the fact that many of the DNA instructions on how to build a dinosaur are still present in a modern day bird. The genetic traits are either recessive or turned off.
