The psychotherapy that addresses "the whole person" is the so-called humanistic psychotherapy. Instead of trying to point fingers at specific problems in an individual's life, it assumes a holistic view, taking the person as a whole instead of focusing on their particular aspects. Its goal is to empower the individual and strengthen their belief in themselves, as well as other people.
Codominance is when both alleles are expressed - one allele is not more dominant than the other.
An example of this is a cow with red and white hair, you can see both colors of hair, not just one.