This rapid growth has left a mark on the human genome, researchers are finding, drastically increasing the number of very rare mutations in our DNA. (discovermagazine.com)
He considered it an extremely rare mutation, changing the dog's genes from «e» (the gene denying black) to «E» (the gene requiring black). (siriusdog.com)
Unlike all other chromosomes in our cells, the Y chromosome, which bears the male sex - determining gene, is passed essentially unchanged from father to son, barring rare mutations. (discovermagazine.com)