How is genetic drift different from natural selection?
Answer and explanation
Correct answer: Genetic drift can occur by chance, whereas natural selection is linked with differences in reproductive success
Genetic drift is a random change in allele frequencies, especially noticeable in small populations; chance events can make a trait common or rare without regard to usefulness. Natural selection is non-random with respect to reproductive success: heritable traits that improve survival or reproduction tend to spread. Therefore A is correct. B wrongly assigns drift to environmental choice, while C and D deny established distinctions.
Frequently asked questions
What is the correct answer to this question?
Genetic drift can occur by chance, whereas natural selection is linked with differences in reproductive success
Why is this the correct answer?
Genetic drift is a random change in allele frequencies, especially noticeable in small populations; chance events can make a trait common or rare without regard to usefulness. Natural selection is non-random with respect to reproductive success: heritable traits that improve survival or reproduction tend to spread. Therefore A is correct. B wrongly assigns drift to environmental choice, while C and D deny established distinctions.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Evolution and speciation.
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