Figure 1: Diagram of pleiotropy. A pleiotropic gene is a single gene that controls more than one trait. Â© 2008 Nature Education All rights reserved. Today, we know that Mendel's observations were the result of pleiotropy, or the phenomenon in which a single gene contributes to multiple phenotypic traits.he term pleiotropy is derived from the Greek words pleio, which means many, and tropic, which means affecting.. Genes that affect multiple, apparently unrelated, phenotypes are thus called pleiotropic genes (Figure 1).
meV, keV, MeV, GeV, TeV and PeV redirect here. For other uses, see MEV, KEV, GEV, TEV and PEV. In physics, the electronvolt (symbol eV, also written electron volt) is a unit of energy equal to approximately 160 zeptojoules (10â21 joules, symbol zJ) or 6981160000000000000â 1.6Ã10â19 joules (symbol J).
electron volt. Standard unit of energy in particle physics. One electron volt is the energy gained by an electron that is being accelerated by an electric potential difference (electric voltage) of 1 volt. One electron volt, in short: 1 eV is equivalent to 1.602176Â·10-19 Joule (the Joule being the energy unit of the SI system of units).