YOU ONLY LIVE ONCE...MAYBE TWICE!
Today in class, we were studying embryology, and at one point the lecturer mentioned that when a woman has a child after the age of 40, it's very likely that the child would be born with Down syndrome. Now this is a genetic disorder, caused by changes in number of chromosomes. Basically, it's a mutation, and it causes physical abnormalities. My hypothesis for today is that zombification can be caused by genetic mutation, much like Down syndrome or sickle cell anaemia. What if there is a mutation- a change in the DNA sequence or number of chromosomes- that brings about physical and mental features in persons, later on in their life, which would allow us to classify them as "zombies"? It is a very vague idea, I must admit, because of a few glitches: factors that may cause such a mutation, like radiation or disease, and how these could bring about such a drastic genetic anomaly. Also, most babies born with serious genetic disorders die very early in life (a few days, or weeks maybe), and even if they do survive, in a case like this, zombification would not be contagious.
Ok, ok, I just sat back for a minutes and analysed this, and I came up with something else. Now, scientists have found that genes could be "switched on or off". We would need an external factor to bring about that change spontaneously, so perhaps radiation of a high degree. there would be that single gene that, when switched on, would cause zombie-like features. Or maybe if a gene was to be switched off. That's possible, right?
I don't know, I'm typing these things right off the top of my head. I have a headache right now anyway.