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.
In Canadian football, all of the players in the backfield can be in motion, in any direction, at the time of the snap, as long as they have not crossed the line of scrimmage before the snap. Defense. Two terms often heard in referring to defensive formations are box and secondary.