SNP genotyping is the measurement of genetic variations of single nucleotide polymorphisms (SNPs) between members of a species. It is a form of genotyping, which is the measurement of more general genetic variation.
On most plays, the center will snap the ball directly into the quarterback's hands. In a shotgun formation, the center snaps the ball to the quarterback lined up several yards behind him.
However the play develops, action of any sort relies on a successful snap, which can be more difficult than it looks. This guide identifies the two methods of snapping the football â under center and shotgun â and looks at what it takes to be successful with each technique.