Question

Given below are two statements, one is labelled as Assertion (A) and other labelled as Reason (R).
• [Assertion (A):] Incomplete penetrance and variable expressivity confuse the relationship between the genotype and phenotype. 
• [Reason (R):] Progeny test for more than one generation may be used to study the nature of penetrance and expressivity, and to establish the genotype of a plant beyond reasonable doubt. 
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 evaluate Assertion-Reason questions of this type:
- Ask yourself: Does the Reason statement answer "Why" the Assertion is true?
- Here, the progeny test is a *solution* to find the genotype, not the *biological cause* of incomplete penetrance or variable expressivity.
- This confirms that both are true, but the Reason is not the correct explanation.

Answer 1

The Correct Option is B