Honestly, it all depends. The physical nature of someone is a mixture of his/her mother and father. It is true, that many girls resemble their mother but it doen't mean they always will. Me? I am a spiting image of my father. My mother and I hardly favor at all. Its all a gamble.
Also, the way someone will look when they are older is partially based on how they lived their lives as a child or teenager. If you're recurring to weight...well, thats cosmetic. If her mother's diet and exercise differs from her's then they will have two different out comes.
Also the make up she wears, or the products she puts on her skin...they can effect the way her skin will look. Sunlight can take its toll as well.
There are many different variables to consider when deciding how someone will look in 10 or 20 years, and some of it does lye with prior generations, but there is a lot someone can do to improve their appearance.