Question

Given below are two statements, one is labelled as Assertion (A) and other labelled as Reason (R).
Assertion (A): In a breeding program, it is relatively easy to handle the 'major genes' for resistance, but it leads to the boom and bust cycle due to the quick breakdown of resistance in the varieties.
Reason (R): Polygenic or partial resistance is durable but breeding for this type of resistance is problematic.
In light of the above statements, choose the correct answer from the options given below.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
• C. (A) is true but (R) is false.
• D. (A) is false but (R) is true.

Hint:

To remember the distinction, think of vertical (monogenic) resistance as complete but temporary, and horizontal (polygenic) resistance as incomplete but long-lasting.

Answer 1

The Correct Option is B