Why can a population with very low variation be at greater risk when a disease suddenly spreads?
Answer and explanation
Correct answer: Because most organisms may share the same weakness
Genetic variation means that individuals in a population differ in their traits, including disease resistance. When variation is very low, most organisms may possess the same susceptible feature. A newly spreading pathogen can then affect many individuals at once, leaving fewer survivors to reproduce. In a more varied population, some individuals may carry resistance and survive. Thus low variation can increase vulnerability; it does not mean that the population lacks genes.
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What is the correct answer to this question?
Because most organisms may share the same weakness
Why is this the correct answer?
Genetic variation means that individuals in a population differ in their traits, including disease resistance. When variation is very low, most organisms may possess the same susceptible feature. A newly spreading pathogen can then affect many individuals at once, leaving fewer survivors to reproduce. In a more varied population, some individuals may carry resistance and survive. Thus low variation can increase vulnerability; it does not mean that the population lacks genes.
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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