if you can sing a low G you are probably an alto or contralto, which is the lowest a female can sing in formal choir it (meaning contralto) is sung below alto and above tenor many altos in my high school choir have trouble singing below low G and the mezzo-sopranos have trouble singing low B i am unsure if i am an alto or a contralto because i can sing the highest out of all the altos in my choir and the lowest out of the choir(i am in an all girl choir)i can sing most of the bass part of the hallelujah chorus (and comfortably too)