A bodies genetic material provides the blueprint for your appearance. Your predisposition to be tall, freckled, blue eyed and blonde are encoded from birth.
However, external and environmental factors can influence the manner these instructions are carried out. For example malnutrition during childhood will affect bone and tooth growth. A lack of oxygen can lead to cerebral palsy with dramatic affects on the bodies muscle development (amongst other things).
Does your current genetic material indicate how you physically appear in real life and not just the genetic markers or 'potential'?
eg : If a scientist had a bloodsample taken today, I know they could say that the subject has obesity markers but could they actually say how fat the person was. Could they determine the difference between what the markers say and what the subject actually appears like?
Is current research limited but indicating that this might be possible in the future?