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.
A player is in an offside position if he is closer to the goal line than both the ball and the second-to-last defender, but only if he is in the opposition half of the field. To be offside, a player must: Be in the opposition half. Be in front of the ball.