How could a "bad" gene-- the mutation that causes the sometimes lethal sickle cell disease -- also be beneficial? On the other hand, if it didn't provide some survival advantage, why had the ...

and he or she might even undergo heart attack or stroke—all because of a single nucleotide mutation (Figure 1). SNPs are important as markers, or signposts, for scientists to use when they look ...

A frameshift mutation is a genetic mutation caused by a deletion or insertion in a DNA sequence that shifts the way the sequence is read. A DNA sequence is a chain of many smaller molecules called ...

By Gina Kolata Researchers have corrected a disease-causing gene mutation with a single infusion carrying a treatment that precisely targeted the errant gene. This was the first time a mutated ...