A SNP is a variation of a single nucleotide between individuals. These polymorphisms can therefore be used to discern small differences both within a population and among different populations.
President of the United States. The President of the United States is the head of state of the U.S., the chief executive of the federal government, and Commander-in-Chief of the armed forces. The United States was the first nation to create the office of President as the head of state in a modern republic.
George W. Bush (born July 6, 1946) was the 43rd President of the  United States, serving two terms from 2001 to 2009. He was formerly  governor of the state of Texas (1995-2 â¦ 000) and is the eldest son of  the 41st US President, George H. Bush.  Soon after the start of George W. Bush's presidency, the  terrorist attacks of September 11, 2001 occurred, and these were  followed by the Afghanistan and Iraqi wars.