Malaria blocking mosquito genetically engineered by scientists

Q.  Using a groundbreaking gene editing technique, researchers inserted a DNA element into the germ line of _____________ mosquitoes that resulted in the gene preventing malaria transmission being passed on to 99.5 per cent of offspring.
- Published on 25 Nov 15

a. Anopheles stephensi
b. Anopheles dephensi
c. None of the above
d. Both a and b

ANSWER: Anopheles stephensi
 
A stephensi is a leading malaria vector in Asia.Researchers packaged anti-malaria genes with an enzyme (which can cut DNA) and a guide RNA to create a genetic "cassette" that, when injected into a mosquito embryo, targeted a highly specific spot on the germ line DNA to insert the anti-malaria antibody genes in this strain. Close to 99.5 percent of offspring exhibited this trait of blocking malaria.

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