These arteries supply blood, oxygen, and nutrients to vital brain structures, such as your brainstem, occipital lobes, and cerebellum. A condition called atherosclerosis can reduce or stop blood flow through the vertebrobasilar system. Atherosclerosis is a hardening and blockage of the arteries.
Codominance - A form of inheritance in which both alleles are equally shown. Incomplete dominance - A form of inheritance in which the heterozygous alleles are both exprâ¦essed, resulting in a combined phenotype. One example is seen in some flower colors. A heterozygote with a red and white allele gives pink.
Some examp â¦ les of codominance are: Blood type-Type AB is codominant because both the antigen A and antigen B show up in the genotype. Cats-If a black cat and tan cat mate, the kitten will have both black fur and tan fur.t means that neither allele is completely dominant over the other. This means that a heterozygote would display traits of both the phenotypes. For example, if BB is black f â¦ ur and bb is white fur, Bb would have black and white spots. 2 people found this useful.