What two problems are associated with the use of mechanical ...

[casperchen82]

What two problems are associated with the use of mechanical replacement heart valves?
 
  What will be an ideal response?

Question 2

In what two ways may the DNA of an organ recipient someday be used to improve the chances of successful organ transplant?
 
  What will be an ideal response?

[tuate]

Answer to Question 1

The two problems with mechanical replacement valves are:

1 . Mechanical valves tend to damage the blood cells as they travel in the heart and through the valve.
2 . Mechanical valves tend to accumulate blood residue, which leads to the valve sticking, which can cause death.

Answer to Question 2

The two ways that the DNA of the organ recipient may be used to improve the chances of successful transplant include:

1 . Genetic transfer could take place and an animal with the recipient's DNA could be grown and ready within six months.
2 . The gene that controls DNA rejection could be identified and turned off.