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 appears to give a 'blending' of the traits. In incomplete dominance, the dominant allele - for example, one that gives a flower a red colour, let's call it R - can only produce enough protein product to give the flower its proper colour when the plant is homozygous RR. If the plant is homozygous rr then the proper product is not produced and the flower is white.