“Dear friends, we are God's children now, and what we will be has not yet been revealed. We know that when He appears, we will be like Him because we will see Him as He is.”
1 John 3:2
When Jesus returns His children will look like Him!
Adopted children usually don't look like their parents. Genetics itself insures that you will look like your birth parents, not your adopted parents.
The only way an adopted child can look like his non birth parents is to undergo major physical alterations. I have of course never heard of an adopted child undergoing plastic surgery so he will look like his father.
But that is what happens with every Christian.
When you were born again into the family of God you did not look like or even act like Jesus. Now as a child of God He shapes you into the likeness of Jesus! He uses every life experience to make you look like Jesus. You will feel the glory of knowing that you are destined to live with God forever, but you will also know the suffering that was such an important part of the life of Jesus.
When a doctor says: "This will hurt a little," you know that it probably will hurt a lot. God never said that we will suffer only a little in this life. And He never said it would not hurt a lot. But He did promise to change us into the image of Jesus Christ! Is that worth the pain? Well, truthfully you can't be like Jesus without the suffering.
Let God cut away everything in your life that does not look like Jesus. Then when Jesus comes you will be like Him!