Getting the updated values of base class variables in Derived class

(Example problem stripped off all other junk to keep it simple)

• Three game objects with their respective classes, A, BaseTest and InherTest(derived from BaseTest).

• Class A, initializes a variable i to 5 in start() and after five seconds changes the value to 10.

• I will then print the value of i in Update() of BaseTest() and in Update of InherTest()

  ---

public class A: MonoBehaviour

{

 public BaseTest baseTest;

 private void Start()
 {
     baseTest.I = 5;
     StartCoroutine(incrementAfter());
 }
 IEnumerator incrementAfter()
 {
     yield return new WaitForSeconds(5);
     baseTest.I = baseTest.I + 5;
 }

}

public class InherTest : BaseTest

{

// Print value of i in Update()

}

public class BaseTest : MonoBehaviour

{

 [SerializeField]

 public int i;

 public int I

 {

     get { return i; }

     set

     {

         i = value;

     }

 }

}

1. Expected behavior and observed: Printing the value of i in BaseTest correctly shows i = 5 and then after five seconds, it shows i = 10.

2. What I didn't get: Printing value of i in Update() of InherTest always shows 0.

3. What I want: Latest value of i to be present in the derived class as well. Is it possible with this type of implementation? What needs to be changed? I do not think I have a firm grasp of inheritance. Please help me out.