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Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as:
- a)Genetic drift
- b)Random mating
- c)Genetic load
- d)Genetic flow
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Variation in gene frequencies within populations can occur by chance r...
- There would be a gene flow if this gene migration, happens multiple times.
- If the same change occurs by chance, it is called genetic drift.
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Variation in gene frequencies within populations can occur by chance r...
Understanding Genetic Drift
Genetic drift is a fundamental mechanism of evolution that describes changes in gene frequency within a population due to random sampling effects. Unlike natural selection, which is a non-random process favoring advantageous traits, genetic drift can lead to significant changes purely by chance.
Key Features of Genetic Drift:
- Random Changes: Genetic drift occurs randomly, meaning that allele frequencies can fluctuate in a population over generations without any relation to the organism's fitness.
- Small Populations: The effects of genetic drift are more pronounced in small populations, where random events can lead to the loss of alleles or fixation of others more easily than in larger populations.
- Founder Effect: This phenomenon occurs when a small group from a larger population establishes a new population. The new population may have a different allele frequency than the original, leading to genetic divergence.
- Bottleneck Effect: When a population undergoes a drastic reduction in size due to environmental events or human activities, the surviving population may have a reduced genetic diversity, affecting allele frequencies.
Importance of Genetic Drift:
- Evolutionary Impact: Genetic drift can lead to the emergence of new species over time as isolated populations diverge genetically.
- Conservation Biology: Understanding genetic drift is crucial for conservation efforts; small populations are more vulnerable to loss of genetic diversity, which can affect their survival.
In summary, genetic drift emphasizes the role of chance in shaping genetic variation within populations, highlighting that not all evolutionary changes are driven by natural selection.
Genetic drift is a fundamental mechanism of evolution that describes changes in gene frequency within a population due to random sampling effects. Unlike natural selection, which is a non-random process favoring advantageous traits, genetic drift can lead to significant changes purely by chance.
Key Features of Genetic Drift:
- Random Changes: Genetic drift occurs randomly, meaning that allele frequencies can fluctuate in a population over generations without any relation to the organism's fitness.
- Small Populations: The effects of genetic drift are more pronounced in small populations, where random events can lead to the loss of alleles or fixation of others more easily than in larger populations.
- Founder Effect: This phenomenon occurs when a small group from a larger population establishes a new population. The new population may have a different allele frequency than the original, leading to genetic divergence.
- Bottleneck Effect: When a population undergoes a drastic reduction in size due to environmental events or human activities, the surviving population may have a reduced genetic diversity, affecting allele frequencies.
Importance of Genetic Drift:
- Evolutionary Impact: Genetic drift can lead to the emergence of new species over time as isolated populations diverge genetically.
- Conservation Biology: Understanding genetic drift is crucial for conservation efforts; small populations are more vulnerable to loss of genetic diversity, which can affect their survival.
In summary, genetic drift emphasizes the role of chance in shaping genetic variation within populations, highlighting that not all evolutionary changes are driven by natural selection.
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Variation in gene frequencies within populations can occur by chance rather than by natural selection.This is referred to as:a)Genetic driftb)Random matingc)Genetic loadd)Genetic flowCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Variation in gene frequencies within populations can occur by chance rather than by natural selection.This is referred to as:a)Genetic driftb)Random matingc)Genetic loadd)Genetic flowCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Variation in gene frequencies within populations can occur by chance rather than by natural selection.This is referred to as:a)Genetic driftb)Random matingc)Genetic loadd)Genetic flowCorrect answer is option 'A'. Can you explain this answer?.
Variation in gene frequencies within populations can occur by chance rather than by natural selection.This is referred to as:a)Genetic driftb)Random matingc)Genetic loadd)Genetic flowCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Variation in gene frequencies within populations can occur by chance rather than by natural selection.This is referred to as:a)Genetic driftb)Random matingc)Genetic loadd)Genetic flowCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Variation in gene frequencies within populations can occur by chance rather than by natural selection.This is referred to as:a)Genetic driftb)Random matingc)Genetic loadd)Genetic flowCorrect answer is option 'A'. Can you explain this answer?.
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