forms over millions of years in the pore spaces of sedimentary rocks from remains of ocean-dwelling phytoplankton; over time it migrates upward toward the highest point in the porous rock because it is less dense than the rock.
Hereditary hemochromatosis (hee-muh-kro-muh-TOE-sus) is a genetic disease that causes the body to absorb and store too much iron. Iron is an important nutrient that our bodies get from food.
1. Cystic Fibrosis. Cystic Fibrosis is one of the most widespread inherited genetic disorders. It most often affects Caucasians who are Ashkenazi Jews. It occurs only when both parents are carriers, which gives their children a 1 in 4 chance of contracting the disease.