Single-nucleotide polymorphisms (SNPs) are single- nucleotide differences between two DNA molecules. They may be base-pair changes or small insertions or deletions . SNPs occur randomly throughout the genome.
This issue of definition has gotten confused by some practitioners using the term "mutation" for "polymorphism" who didn't know better and they have been teaching that terminology to the public. I don't know if that usage can be reeled in at this point, but I'm trying.
Pedro Lobo Fernandes
Instituto Gulbenkian de Ciência (IGC)
Susan Costen Owens
Autism Research Institute
International Centre for Diarrhoeal Disease Research, Bangladesh
Ecole Pratique des Hautes Etudes
Beijing Proteome Research Center
University of California, Davis
Pusan National University
Silesian University in Opava
Chongqing Medical University
Elkin Roman Garcia-cifuentes
Pontifical Xavierian University (Bogota)