Mosaicism is a form of non-Mendelian inheritance wherein two or more cell populations with different genotypes exist in an organism, derived from a single zygote, as a result of experimental manipulation or to faulty distribution of genetic material during mitosis.
(December 2013) The helix piercing is a perforation of the helix or upper ear (cartilage) for the purpose of inserting and wearing a piece of jewelry. The piercing itself is usually made with a small gauge hollow piercing needle, and typical jewelry would be a small diameter captive bead ring, or a stud.
Helix Piercing. This kind of piercing is generally done with a sterile hollow needle of 18 gauge or even curved ones mainly used by novice piercers. A tiny cork can be used to block the opening of the ear canal, also preventing foreign particles from entering the ear.