For a long time, evolutionary biologists have thought that the genetic mutations that drive the evolution of genes and proteins are largely neutral: they're neither good nor bad, but just ordinary ...

Genes hold the recipe for proteins, which are made of amino acids. DNA only has four letters, or nucleotides, and each sequence of three nucleotide bases, or codon, encodes for one amino acid. There ...

In simple terms: a mutation is a stable change in genetic sequence that can be copied when cells or viruses replicate. Most mutations have no detectable effect, some contribute to disease, and a small ...

Ever since the genetic code was cracked, those mutations have generally been assumed to be neutral, or nearly so. But in a study published online June 8 in the journal Nature that involved the genetic ...