With one gene controlling a trait we have three possible genotypes, AA, Aa and aa and depending on the allelic interactions (dominance or incomplete dominance) we can have two or three phenotypes. As more and more genes control a trait, a greater number of genotypes are possible. The formula that predicts the number of genotypes from the number of genes is 3 to the power n. (n is the number of genes.) The following is the number of genotypes for a selected number (n) of genes which control an arbitrary trait.
Coal-Powered Electric Cars Out-Pollute Fossil Fuels. by. If the energy used to power electric vehicles comes from traditional resources such as burning coal rather than renewable sources, driving battery-powered cars will pollute the air more than cars powered by fossil fuels.
Electric Utilities: Good Bye Coal, Hello Natural Gas. For electric generating utility owners, the ongoing seismic shift in fuels used for power generation will alter the utility investment landscape. In short: Coal is out, Natural Gas is in. Not only is the government and media pushing this addenda, but so is simple current economics.