While it is often convenient to talk about a recessive allele or a dominant trait, dominance is not inherent to either an allele or its phenotype. Dominance is a relationship between two alleles of a gene and their associated phenotypes.
January 6th, 2012, 12:12 PM. Re: What octane gas is best to use for a two stroke outboard motor. If you're looking for solvents in the higher octane fuels to clean out the fuel system, the ethanol itself is a great solvent to loosen up crud in the fuel system.
In the U.S., unleaded gasoline typically has octane ratings of 87 (regular), 88â90 (midgrade), and 91â94 (premium). Gasoline with an octane rating of 85 is available in some high-elevation areas of the U.S. (more about that below). The octane rating is prominently displayed in large black numbers on a yellow background on gasoline pumps.