I understand how alleles are written on SNPedia, such as:
(A;A) 0 normal (A;G) 2.1 1.32 x risk of rheumatoid arthritis. (G;G) 2.2 >1.32 x risk of rheumatoid arthritis
However, when searching on the web I often found things written in this manner that I do not understand:
FOLR3 rs7925545 +G/-A reduced folate carrier
From this last description, does anyone know how to read (a) what's the normal or most common, (b) what the +C and -A indicate? For example, on that one I am AA. Does that make me more likely to be a reduced folate carrier or more likely?
I don't know if the +G/-A is about orientation or probability.
It would be wonderful if someone could explain this to me so that when I see things written in the "+G/-A" format I know how to read that on dbSNP and so on.