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.
It means, buyer beware.. The wrong fuel octane used in your engine can mean the early demise of your engine and you, if you are not careful. Octane 101. The octane rating of gasoline refers to the fuel's anti-knock quality, Autogas octane is rated differently than that of avgas. Two CFR (Cooperative Fuel Research) knock-test engines, adopted by ASTM, are used to test automotive gasoline according to ASTM D 2699 and D2700 standards.