All of the following diseases have a genetic component, but which is inherited via a single gene? ...

All of the following diseases have a genetic component, but which is inherited via a single gene?
  1.Alcoholism
  2.Alzheimer disease
  3.Huntington Disease
  4.Schizophrenia
  5.Bipolar disorder
  6.Depression

Question 2

Which of the following choices best describes the genetic engineering used to prevent rejection of xenotransplants?
  1.Transgenic pigs carrying human genes donate organs to patients who also receive bone marrow transplants from the donor pig.
  2.Hyperacute rejection of MHC proteins from animal donors is prevented by the use of cloned animal tissues lacking MHC markers.
  3.Transgenic pigs carrying human genes donate organs to patients who also receive bone marrow transplants from the donor pig, resulting in chimeric immune systems.
  4.A bone marrow transplant from the human patient to the donor pig affects MHC proteins on the pig organs, reducing the severity of xenotransplant rejection.