Question:
Which one of the following occurs due to changes in the environment and genetic variations of the species?
Which one of the following occurs due to changes in the environment and genetic variations of the species?
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Genetic drift = Random change in allele frequency, especially in small populations.
Updated On: May 4, 2026
- Hybrid sterility
- Geographical isolation
- Genetic drift
- Chromosomal aberrations
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The Correct Option is C
Solution and Explanation
Concept:
Evolutionary processes occur due to changes in genetic composition influenced by environmental factors and random variations.
Step 1: Understand genetic drift. Genetic drift refers to random changes in allele frequencies in a population, often influenced by environmental factors and chance events.
Step 2: Analyze options.
• (A) Hybrid sterility → Reproductive barrier $\times$
• (B) Geographical isolation → Physical separation $\times$
• (C) Genetic drift → Change due to variation + environment \checkmark
• (D) Chromosomal aberrations → Structural mutations $\times$
Step 3: Conclusion. \[ \text{Genetic drift occurs due to environmental changes and variations} \]
Evolutionary processes occur due to changes in genetic composition influenced by environmental factors and random variations.
Step 1: Understand genetic drift. Genetic drift refers to random changes in allele frequencies in a population, often influenced by environmental factors and chance events.
Step 2: Analyze options.
• (A) Hybrid sterility → Reproductive barrier $\times$
• (B) Geographical isolation → Physical separation $\times$
• (C) Genetic drift → Change due to variation + environment \checkmark
• (D) Chromosomal aberrations → Structural mutations $\times$
Step 3: Conclusion. \[ \text{Genetic drift occurs due to environmental changes and variations} \]
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