What Determines The Color Of Eyes?
mosquitoes from black to yellow and changed their eye color from black to white.
Mosquitoes' stinging bites are irritating and itchy, but they can also be dangerous. From malaria, to dengue, to yellow fever, to Zika, mosquito-borne illnesses affect billions of people worldwide each year, sometimes causing debilitating symptoms.
One strategy that experts use to combat these diseases is reducing mosquito populations. But pesticides carry risks to human health, and prolonged use of these poisons can lead to resistance in mosquitoes, making the toxins less likely to work.
another solution that tackles the problem at a genetic level may soon become a reality. Gene Chart Eye Color , another solution that tackles the problem at a genetic level may soon become a reality.
Scientists are genetically modifying mosquitos that act as vectors — organisms that transmit an infectious agent — to disrupt the insects' cycles of breeding and infection through traits that the mosquitoes would then pass on to future generations. [
One of the most powerful gene-editing tools in scientists' arsenal is
, which targets short, repeating strands of DNA using a protein known as Cas9 to snip through DNA strands. CRISPR, pronounced "crisper," is an acronym for "clustered regularly interspaced short palindromic repeat," which describes the type of DNA sequences that the technique addresses.
, researchers have been able to edit genes in mice Gene Chart Eye Color , fruit flies and even human cells with unprecedented precision. And recently, scientists altered the genomes of
mosquitoes so that the insects' own cells would produce the Cas9 protein required for CRISPR techniques. This allowed the scientists to perform highly targeted genetic surgery.
that controlled physical features in the insect, creating features that would be highly visible and easy to track.
mosquito resulted from edits to its genome, done with the help of a protein produced in the insect's cells.
Credit: Michelle Bui/University of California, Riverside
The researchers tweaked the mosquitoes' genomes to alter traits linked to blood feeding, flight and vision, producing mosquitoes that had white eyes instead of black ones, malformed wings or a proboscis that could not draw blood. Other genetic alterations to the mosquitoes resulted in yellow body color and extra eyes or limbs, the study authors reported.
By comparison, mutations that were introduced in strains of mosquitoes that did not produce the Cas9 protein were less successful, and the mosquitoes were less likely to survive, the researchers discovered.
Genetically altering mosquitoes to produce the Cas9 protein — a key component of CRISPR gene editing — within their own cells lays the groundwork for scientists to modify specific areas of the mosquitoes' genomes more efficiently, according to the study. This could help researchers chart a quicker path toward DNA-driven strategies for managing how mosquitoes feed and breed, according to the study. This could help researchers chart a quicker path toward DNA-driven strategies for managing how mosquitoes feed and breed Gene Chart Eye Color
The findings were published online Nov. 14 in the journal
How Close Are We, Really, to Curing Cancer with CRISPR?
Mindy Weisberger is a senior writer for Live Science covering general science topics, especially those relating to brains, bodies, and behaviors in humans and other animals — living and extinct. Mindy studied filmmaking at Columbia University; her videos about dinosaurs, biodiversity, human origins, evolution, and astrophysics appear in the American Museum of Natural History, on YouTube, and in museums and science centers worldwide. Follow Mindy on
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