Question

The frequency distribution of heritable traits can be altered by natural selection in the following ways except:

• A. Directional Selection
• B. Balancing Selection
• C. Non-Directional Selection
• D. Random Selection

Hint:

As per the NTA key, balancing selection maintains rather than shifts the trait distribution.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:

• We must find the mode of selection that does not alter the frequency distribution of heritable traits.

Step 2: Detailed Explanation:

• As per the NTA final answer key, the odd one out is Balancing Selection, which maintains (balances) existing variation and polymorphism rather than shifting the trait distribution.

• Directional selection shifts the distribution towards one extreme.

Step 3: Final Answer:
The correct option is (B) Balancing Selection.