Tay-Sachs disease is caused by a defective gene on chromosome 15. When both parents carry the defective Tay-Sachs gene, a child has a 25% chance of developing the disease. The child must receive two copies of the defective gene -- one from each parent -- in order to become sick.
Enacted by law in 2013, the newest symbols of North Carolina are the state art medium, clay; the state fossil, the Megalodon teeth; the state frog, the Pine Barrens tree frog; the state marsupial, the Virginia opossum; and the state salamander, the Marbled salamander.
North Carolina's official State motto is esse quam videri which is Latin and means To be, rather than to seem (to be). Car Licence plates in North Carolina carry the motto Fiâ¦rst in Flight. commemorating the Wright Brothers first flight in a powered heavier than air machine on 3rd December 1903.