|MadSci Network: Genetics|
Tons of genes! Fingerprints, as you know, are very complex and require a whole bunch of genes to create them. There are several genes that are involved in creating the pattern of the fingerprint. But, you have to realize that other biological processes are important for creating fingerprints as well. You need to make this skin and muscle that underlie your fingertips, blood vessels to nourish the skin, etc. So really, it takes hundreds, possibly thousands of genes to actually make the fingerprint on the tip of your fingers.
Try the links in the MadSci Library for more information on Genetics.