How tall am i going to be if my mom is 5'3 and my dad is 6'0 and i weigh 75lbs and i am 12 4'9?

you could be either tall or small, depending on whether you get good exercise and a balanced diet, plus which one of your parents have a more dominant gene. you might not be very tall as i was 5'4 when I was twelve (only a year ago :) you should probably find out how tall your relatives were, my mother isn't too tall be lots of her ancestors were, probably why I am.