<span>DNA methylation is a process that can change the activity of a gene without rearranging the DNA sequence. The mechanism most often is used to inactivate genes.</span>
<span>Poodle, Boxer, English Bulldog, Yorkshire Terrier, Golden Retriever, Beagle, German Shepherd, and <span>Labrador Retrievers are the most popular breeds of dogs, but there is not a "Most popular breed of dog" but many</span></span>