medium · GMAT Verbal
Gene drives can spread a malaria-blocking gene through wild mosquito populations far faster than ordinary inheritance. In cage trials, the drive reached nearly every mosquito within months. But any mosquito carrying a chance mutation that resists the drive would pass it on, and resistant insects breed normally.
Which of the following is most strongly supported by the statements above?
- Gene drives have already eliminated malaria in wild mosquito populations.
- If resistance mutations arise and spread, the drive may fail to reach every mosquito in a population.
- Resistant mosquitoes are more harmful to humans than non-resistant ones.
- Ordinary inheritance spreads genes faster than gene drives do.
- Gene drives pose no ecological risk of any kind.
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