Genetic variation and the consequence in phenotype

What makes us who we are?

Popular opinion, fostered by the newspapers and television, took the view that we were determined by our genes. That is to say, everything about us was determined by our genes. Although most scientists did not believe this was not the case, it was not until the completion of the mapping of the genome that science reporters began seriously to latch on to the idea that there really is more to us than just our genes.

Steven Rose puts it this way:

"Humans are not empty organisms, free spirits constrained only by the limits of our imaginations. Nor are we reducible to "nothing but" machines for the replication of our DNA. We are rather, the product of the constant dialectic between "the biological" and "the social" through which humans have evolved, history has been made and we as individuals have been developed."

(1) Lifelines, Biology, Freedom and Determinism, copyright (c) Steven Rose 1997, Allen Lane Penguin Press, ISBN 0-713-99157-7

There are two types of variation within genes

Of special significance within each Chromosome two kinds of variation: