No, it cannot because codominance is the expression of both alleles coming forth from each parent. One parent would be R(A)R(A) and the other parent would be R(B)R(B). Their offspring would only be able to be R(A)R(B). They could not be homozygous.
<span>Timothy most likely suffered from schizophrenia. The symptoms of psychotic disorder correlate with the symptoms of schizophrenia. Clinical psychology helps with treatment through talking while neurologist treat through brain surgeries.</span>