Yes with extra attention given to lagging parts they can start to become more in proportion with the rest of your body. However here is a few things to think about my friend. Unless you have super super freakishly large body parts that grow so damn large they just look funny dont worry about it. Unless you got super super weak body parts that are so freakishly small that they look out of place do not worry about it so much... Everyone one has genetics. Everyone has some body parts that are bigger/smaller then others and need more/less work then others. Even all the great pro's out there have this problem.
Every single one of them my man. So ya work on them lagging body parts and work hard on them. But don't beat your self up about any of it and don't make it your whole goal to make your body all perfectly in line. I say work hard on lagging body parts ya, but at the same time remember to give your self a pat on the back for the parts you have that grow well. Keep training them and be proud of what you got rather then down on your self for what you dont got.
I happen to have large quads but I still train them. I also have skinny wrist but i dont beat my self up over it. I have gone down that road in my mind in the past. I would stare at my wrist and think fuck man my wrist are skinny. dwell on it long enough and it will drain the motivation right out of you. I trained my wrist to death with out much to show for it but a little extra gain. Almost let it rip me up inside. But when others look at my wrist/lower arms. The only comments I ever get is " holy shit dude you got some think forarms" . So what you see is not always what is real ya know. Just enjoy what you got, work extra hard on things lacking but never let it fuck with your head man.
also I moved this to the right forum for you. Next time read the rules and put threads in the forums they go in. Thanks