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.
Freebase(0.00 / 0 votes)Rate this definition: In American football the holder is the player who receives the snap from the long snapper during field goal attempts made by the placekicker. The holder is set on one knee approximately 7 yards behind the line-of-scrimmage.