Question:
In which type of natural selection, the phenotypes attain peak:
In which type of natural selection, the phenotypes attain peak:
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Stabilising selection favours average phenotypes and reduces variation.
Updated On: May 19, 2026
- Directional
- Saltation
- Disruptive
- Stabilising
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The Correct Option is D
Solution and Explanation
Concept:
Natural selection changes the frequency of phenotypes in a population according to their fitness.
Step 1: Understand stabilising selection.
In stabilising selection, intermediate phenotypes are favoured and extreme phenotypes are selected against. \[ \text{Intermediate phenotype} \rightarrow \text{maximum fitness} \]
Step 2: Meaning of peak.
When phenotypes attain a peak around the average or intermediate value, it represents stabilising selection. \[ \text{Peak at mean phenotype} \rightarrow \text{Stabilising selection} \]
Step 3: Compare with other types.
Directional selection favours one extreme.
Disruptive selection favours both extremes.
Saltation refers to sudden large variation. \[ \therefore \text{Correct Answer is (D)} \]
Natural selection changes the frequency of phenotypes in a population according to their fitness.
Step 1: Understand stabilising selection.
In stabilising selection, intermediate phenotypes are favoured and extreme phenotypes are selected against. \[ \text{Intermediate phenotype} \rightarrow \text{maximum fitness} \]
Step 2: Meaning of peak.
When phenotypes attain a peak around the average or intermediate value, it represents stabilising selection. \[ \text{Peak at mean phenotype} \rightarrow \text{Stabilising selection} \]
Step 3: Compare with other types.
Directional selection favours one extreme.
Disruptive selection favours both extremes.
Saltation refers to sudden large variation. \[ \therefore \text{Correct Answer is (D)} \]
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