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.
Abstract. Monogenic inheritance refers to genetic control of a phenotype or trait by a single gene. For a monogenic trait, mutations in one (dominant) or both (recessive) copies of the gene are sufficient for the trait to be expressed.igenic inheritance refers to mutation on two genes interacting to cause a genetic phenotype or disease. Triallelic inheritance is a special case of digenic inheritance that requires homozygous mutations at one locus and heterozygous mutations at a second locus to express a phenotype.