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.
Genetic traits can be passed through families in several distinct patterns. The most common patterns are the following: 1  Dominant genetic diseases are caused by a mutation in one copy of a gene.2  If a parent has a dominant genetic disease, then each of that personâs children has a 50% chance of inheriting the disease. Dominant diseases can also occur spontaneously; this happens when a random mutation in one gene occurs at conception. 2  Examples of dominant genetic diseases include Achondroplasia and Huntington disease. 3  For some dominant genetic diseases, there may be specific DNA tests available. 4  Recessive genetic diseases.