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.
Incomplete dominance is when neither allele for a gene is completely dominant over the other whicâ¦h leads to a phenotype (physical look or characteristic) somewhere between the two parents. An example of complete dominance would be in Mendel's classic pea cross experiment, with yellow peas being dominant to green peas.