â¢ TORNADO (noun). The noun TORNADO has 2 senses: 1. a localized and violently destructive windstorm occurring over land characterized by a funnel-shaped cloud extending toward the ground. 2. a purified and potent form of cocaine that is smoked rather than snorted. Familiarity information: TORNADO used as a noun is rare.
In other words, nothing is different about the way these alleles are inherited; the only difference is in the way the alleles determine phenotype when they are combined. As opposed to partial dominance, codominance occurs when the phenotypes of both parents are simultaneously expressed in the same offspring organism.
In codominance, the heterozygote displays the phenotypic characteristics of both alleles. An example of a codominant trait is the MN blood group system of human beings. Blood type in the MN system is determined by the alleles M and N. Homozygotes for the M allele (MM) have a particular molecule on the surface of their red blood cells. Those individuals homozygous for. genetics...