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.
Not all alleles are dominant and recessive like the ones Mendel studied in his pea plants. Some alleles are equally strong and neither are masked by the other. When both alleles are present, they are both expressed in the phenotype. The hybrid is a blend of both alleles. Alleles which are equally strong are said to be incomplete dominant alleles.An example of this is found in carnations.When purebred white carnations are crossed with purebred red carnations, the result is a pink carnation.ncomplete dominant alleles are represented by different capitalized letters. Codominance, is a situation in which both alleles are equally stong and both alleles are visible in the hybrid genotype. An example of codominance is found in chickens.