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.
Seal, State. The design of North Carolina's state seal, officially called the Great Seal of the State of North Carolina, was standardized by the General Assembly in 1971 and modified in 1983 after many variations. The official seal is a circle 2Â¼ inches in diameter that features the robe-covered figures of Liberty and Plenty in its center.