What does the "-" observed allele mean in dbSNP? I am using dbSNP128 for the mouse mm9 reference genome and there are several thousand such SNPs, for example rs8253350 (http://genome.ucsc.edu/cgi-bin/hgc?h...28&i=rs8253350). I have been unable to find an explanation on the UCSC or dbSNP websites.
Many thanks.
Many thanks.
Comment