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.
By Regina Bailey. Definition: Incomplete dominance is a form of intermediate inheritance in which one allele for a specific trait is not completely expressed over its paired allele. This results in a third phenotype in which the expressed physical trait is a combination of the dominant and recessive phenotypes. Incomplete genetic dominance is similar to, but different from co-dominance. In co-dominance, an additional phenotype is produced, however both alleles are expressed completely. Co-dominance is exemplified in AB blood type inheritance.