Question:
Which one of the following is INCORRECT about genetic drift?
Which one of the following is INCORRECT about genetic drift?
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Genetic drift is a chance change in allele frequency. Decide in which kind of population chance matters more.
Updated On: Nov 12, 2026
- Genetic drift is also called the Sewall Wright Effect.
- The effect of genetic drift is more significant in large populations.
- Genetic drifts are directionless.
- Sometimes a few individuals become isolated from large populations and produce a small new population in a new geographical area.
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Genetic drift is a random change in allele frequency, also called the Sewall Wright effect.
Step 2: Check each statement
It occurs by chance, so it is directionless. When a few individuals found a new small population in a new area, drift acts strongly.
Step 3: Find the incorrect one
Random changes alter allele frequencies noticeably only in small populations. In large populations they average out, so drift is not more significant there.
Final Answer:
The statement that drift is more significant in large populations is incorrect. \[ \boxed{\text{(B) }\text{The effect of genetic drift is more significant in large populations.}} \]
Genetic drift is a random change in allele frequency, also called the Sewall Wright effect.
Step 2: Check each statement
It occurs by chance, so it is directionless. When a few individuals found a new small population in a new area, drift acts strongly.
Step 3: Find the incorrect one
Random changes alter allele frequencies noticeably only in small populations. In large populations they average out, so drift is not more significant there.
Final Answer:
The statement that drift is more significant in large populations is incorrect. \[ \boxed{\text{(B) }\text{The effect of genetic drift is more significant in large populations.}} \]
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