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 Cartilage piercing. A helix cartilage piercing is not in need of explaining where it is made (it is evident that in the helix cartilage itself). Ears' piercing (along with nose piercing) is, by the way, considered to be at the upstream of piercing in general.