About 7 percent of the human genome is similar to the DNA of other mammals, said Arend Sidow of Stanford University. Because it is similar, or “conserved,” geneticistswow cataclysm bet
assume this DNA is the most integral. In all, Sidow concludes, these important parts of the genome comprise only 225 million of the 3 billionwow third expansion
chemical letters of DNA found in the complete human genetic instruction book.