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.
mtDNA has found a vital niche in forensic DNA testing. Its abundance in the cell is much higher (up to several thousand copies) than nDNA (four template copies for polymerase chain reaction (PCR)), which correspondingly increases the chances that some copies of it survive in highly degraded forensic samples.