Word Origin and History for mesopotamian. ancient name for the land that lies between the Tigris and Euphrates rivers (in modern Iraq), from Greek mesopotamia (khora), literally a country between two rivers, from fem. of mesopotamos, from mesos middle (see medial (adj.)) + potamos river (see potamo-).
Monogenic forms, caused by a single mutation in a dominantly or recessively inherited gene, are well-established, albeit relatively rare types of PD. They collectively account for about 30% of the familial and 3%â5% of the sporadic cases.
1 A major distinction among monogenic disorders is between dominant and recessive diseases. 2  Dominant diseases are caused by the presence of the disease gene on just one of the two inherited parental chromosomes. 3  In dominant diseases, the chance of a child inheriting the disease is 50 percent.