Question:
Given below are two statements.
Statement I - Directional selection favours intermediate forms and eliminates both phenotypic extremes.
Statement II - In directional selection, more individuals acquire value other than mean character value.
In the light of above statements, select the correct option given below:
Given below are two statements.
Statement I - Directional selection favours intermediate forms and eliminates both phenotypic extremes.
Statement II - In directional selection, more individuals acquire value other than mean character value.
In the light of above statements, select the correct option given below:
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Directional selection shifts the population towards one extreme, not towards the mean.
Updated On: Nov 13, 2026
Both statement I and statement II are correct.
Both statement I and statement II are incorrect.
Statement I is correct but statement II is
Statement I is incorrect but statement II is incorrect. correct.
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
There are three types of natural selection: stabilising, directional and disruptive.
Step 2: Statement I
Favouring intermediate forms and eliminating both extremes is stabilising selection, so Statement I is incorrect.
Step 3: Statement II
In directional selection, more individuals acquire a value other than the mean, so the peak shifts. Statement II is correct.
Final Answer:
Statement I is incorrect and Statement II is correct. \[ \boxed{\text{(D) }\text{Statement I is incorrect but statement II is correct.}} \]
There are three types of natural selection: stabilising, directional and disruptive.
Step 2: Statement I
Favouring intermediate forms and eliminating both extremes is stabilising selection, so Statement I is incorrect.
Step 3: Statement II
In directional selection, more individuals acquire a value other than the mean, so the peak shifts. Statement II is correct.
Final Answer:
Statement I is incorrect and Statement II is correct. \[ \boxed{\text{(D) }\text{Statement I is incorrect but statement II is correct.}} \]
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