Most people know that 28.35 grams is 1 Ounce, but that is the avoirdupois Ounce, the common method to weigh groceries etc. When you are weighing precious metals or stones, jewellers use another method called Troy in which 31.103 grams is 1 Troy Ounce.So remember:ost people know that 28.35 grams is 1 Ounce, but that is the avoirdupois Ounce, the common method to weigh groceries etc. When you are weighing precious metals or stones, jewellers use another method called Troy in which 31.103 grams is 1 Troy Ounce. So remember:
Used For: mtDNA tests can be used to test your direct maternal lineage - your mother, your mother's mother, your mother's mother's mother, etc. mtDNA mutates much more slowly than Y-DNA, so it is really only useful for determining distant maternal ancestry. Available To: Everyone.
Gene testing can be used to confirm a diagnosis of hemochromatosis. There are two gene tests: the cheek test and the whole blood test. The cheek test uses a mascara-like wand to scrape cells from the inside of the mouth. For a whole blood test, a vial of blood is drawn from the arm.