that is why i mentioned 2a saperately below.....DNA are not alwas in pair, as well, there are secondary DNA structures exist in the genome, where are not parallal......
similiar as human beings, not always in couples.......
danlian de DNA..... :$
yes, I know, but consider they are lvl 1 course student,
do you think they will touch that deep?
Huasing Association 1999 - 2013