The Best Laid (Body) Plans

This Chapter we are shown the similarities of many different animals including humans. We looked just like other developing embryos and as a result many questions were raised in my head. Then how do we become humans and they become fish? Where does it change? Could we change something in the way we develop and become fish instead? Just like Neil and many other scientists I am now thinking how to discover the answer. What was really fascinating in this chapter to me was that if a small tissue was removed and transferred to another developing egg that egg would form into twins. This would make it possible for twins to be created out of every fertilized egg. What interested me most was that if a patch of tissue was removed from a chicken and grafted to a salamander you would get a twinned salamander instead of a chicken and a fish. It shows that the DNA of the salamander was able to use the chicken tissue to make its twin. Showing that the connection is deep enough to take the tissue as its own.