After a sudden disaster, some organisms survive and their traits become more common in the population. What can this be related to?
Answer and explanation
Correct answer: Genetic drift, especially a bottleneck effect
A sudden disaster can sharply reduce the size of a population, leaving only a small, possibly random sample of the original individuals. Because the survivors may carry certain alleles by chance, the frequencies of those alleles can change in the remaining population. This random change is genetic drift, and the disaster scenario is specifically called a bottleneck effect. Option A is correct; B, C and D are physiological processes, not population-level changes in allele frequency.
Frequently asked questions
What is the correct answer to this question?
Genetic drift, especially a bottleneck effect
Why is this the correct answer?
A sudden disaster can sharply reduce the size of a population, leaving only a small, possibly random sample of the original individuals. Because the survivors may carry certain alleles by chance, the frequencies of those alleles can change in the remaining population. This random change is genetic drift, and the disaster scenario is specifically called a bottleneck effect. Option A is correct; B, C and D are physiological processes, not population-level changes in allele frequency.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
