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.
What is Quarterback? A position on the offense responsible for initiating the majority of offensive plays. The quarterback is relaying the play call to the rest of the offense, adjusting the offense prior to the snap, taking the snap from center, and executing the play. That can entail handing the ball off to a running back, running the ball on their own, or attempting a pass downfield.