Strong vs. Weak Genes
In a world of seven-or-so billion people, it is hard to comprehend that no two of us look exactly alike. Except me and Angelina Jolie. Twinsies.
Ang and I aside, we are each biologically granted a unique set of attributes that, combined, become our overall physical appearance. While these characteristics, at times, seem completely random (not at all looking at you, cousin Adrian), there is actually a fairly scientific method to the madness.
Through the analysis of strong vs. weak genes, we can make a fairly accurate prediction of what a child will look like based on the genetic attributes of his or her parents. Because there are so many possible combinations of these attributes, most of us are doppleganger-less in the world at large. But there is a pattern!