In a small isolated group, some traits become more common only by chance. This situation is related to which evolutionary idea?
Answer and explanation
Correct answer: Genetic drift
Genetic drift is the random change in the frequency of alleles or traits within a population. Its effect is especially strong in small, isolated populations, where chance events can make a trait common or remove it even when the trait provides no survival advantage. Therefore, option A is correct. Digestion, respiration and photosynthesis are life processes, not mechanisms that explain random changes in inherited traits.
Frequently asked questions
What is the correct answer to this question?
Genetic drift
Why is this the correct answer?
Genetic drift is the random change in the frequency of alleles or traits within a population. Its effect is especially strong in small, isolated populations, where chance events can make a trait common or remove it even when the trait provides no survival advantage. Therefore, option A is correct. Digestion, respiration and photosynthesis are life processes, not mechanisms that explain random changes in inherited traits.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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