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.
Achondroplasia. Pets with achondroplasia, commonly called dwarfism, have a mutation in the gene for the fibroblast growth factor receptor. This mutation can cause stunted limbs and other bone growth abnormalities. In some breeds, such as the munchkin, dachshund, Welsh corgi and Skye terrier, this mutation has been selected for by breeders.