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 these statements?
- Gene drives have already eliminated malaria across wild mosquito populations in the field.
- If resistance mutations arise and spread, the drive may fail to reach every mosquito in a population.
- Mosquitoes that resist the gene drive end up considerably more harmful to humans than the non-resistant ones are.
- Ordinary Mendelian inheritance spreads a beneficial gene through a population faster than gene drives do.
- Gene drives carry no ecological risk of any kind to the other species living around them.
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