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.
Hiyaa, well basically I got my helix pierced (with a gun, so the stud is just like any old ear stud. Probably wasn't the best idea - I know, I should I have got it done with a needle. :) but yeah, I went to go change it and I can't get the back off the stud.